CVE-2026-74994

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A user added to one\nprotected directory is accepted as valid for all other protected directories on the same server instance.</p>\n<p>This issue affects OTP from OTP&nbsp;17.0 before OTP&nbsp;27.3.4.17, OTP&nbsp;28.5.0.6, and OTP&nbsp;29.0.6, corresponding to inets from 5.10 before 9.3.2.7, 9.6.2.3, and 9.7.2. Whether OTP before OTP&nbsp;17.0, corresponding to inets before 5.10, is affected is unknown.</p>"}, {"base64": false, "type": "text/markdown", "value": "The mod_auth module in OTP's inets httpd server, when configured with dets or mnesia authentication backends and multiple directory configuration blocks, collapses all directory blocks into a single shared user/group namespace. A user added to one\nprotected directory is accepted as valid for all other protected directories on the same server instance.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a027.3.4.17, OTP\u00a028.5.0.6, and OTP\u00a029.0.6, corresponding to inets from 5.10 before 9.3.2.7, 9.6.2.3, and 9.7.2. Whether OTP before OTP\u00a017.0, corresponding to inets before 5.10, is affected is unknown."}], "value": "The mod_auth module in OTP's inets httpd server, when configured with dets or mnesia authentication backends and multiple directory configuration blocks, collapses all directory blocks into a single shared user/group namespace. A user added to one protected directory is accepted as valid for all other protected directories on the same server instance.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a027.3.4.17, OTP\u00a028.5.0.6, and OTP\u00a029.0.6, corresponding to inets from 5.10 before 9.3.2.7, 9.6.2.3, and 9.7.2. Whether OTP before OTP\u00a017.0, corresponding to inets before 5.10, is affected is unknown."}], "impacts": [{"capecId": "CAPEC-122", "descriptions": [{"lang": "en", "value": "CAPEC-122 Privilege Abuse"}]}, {"capecId": "CAPEC-114", "descriptions": [{"lang": "en", "value": "CAPEC-114 Authentication Abuse"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 6, "baseSeverity": "MEDIUM", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-863", "description": "CWE-863 Incorrect Authorization", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-1289", "description": "CWE-1289 Improper Validation of Unsafe Equivalence in Input", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-11-11T13:45:44.238Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://github.com/erlang/otp/security/advisories/GHSA-c3cq-q8x6-547g"}, {"name": "EEF CNA record for CVE-2026-74994", "tags": ["related"], "url": "https://cna.erlef.org/cves/CVE-2026-74994.html"}, {"name": "OSV record EEF-CVE-2026-74994", "tags": ["related"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-74994"}, {"name": "Erlang/OTP version ordering", "tags": ["x_version-scheme"], "url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"}, {"name": "Fix commit 6982e38 in erlang/otp", "tags": ["patch"], "url": "https://github.com/erlang/otp/commit/6982e381137ede21a4e1faf5fa2dd82321691176"}, {"name": "Fix commit c5ccec8 in erlang/otp", "tags": ["patch"], "url": "https://github.com/erlang/otp/commit/c5ccec8ed25c70ec6557fd81277e4b2f52285c19"}, {"name": "Fix commit 6101cb7 in erlang/otp", "tags": ["patch"], "url": "https://github.com/erlang/otp/commit/6101cb74ff2870718c622ba7af0c100f7f2524e3"}], "source": {"discovery": "UNKNOWN"}, "title": "inets, httpd: Authentication Bypass via Directory Namespace Collapse in httpd mod_auth"}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-01T15:57:45.946562Z", "id": "CVE-2026-74994", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-01T15:57:51.022Z"}}]}}

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A user added to one protected directory is accepted as valid for all other protected directories on the same server instance.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a027.3.4.17, OTP\u00a028.5.0.6, and OTP\u00a029.0.6, corresponding to inets from 5.10 before 9.3.2.7, 9.6.2.3, and 9.7.2. Whether OTP before OTP\u00a017.0, corresponding to inets before 5.10, is affected is unknown.", "supportingMedia": [{"type": "text/html", "value": "<p>The mod_auth module in OTP's inets httpd server, when configured with dets or mnesia authentication backends and multiple directory configuration blocks, collapses all directory blocks into a single shared user/group namespace. A user added to one\nprotected directory is accepted as valid for all other protected directories on the same server instance.</p>\n<p>This issue affects OTP from OTP&nbsp;17.0 before OTP&nbsp;27.3.4.17, OTP&nbsp;28.5.0.6, and OTP&nbsp;29.0.6, corresponding to inets from 5.10 before 9.3.2.7, 9.6.2.3, and 9.7.2. 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{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unknown", "packageName": "otp", "packageURL": "pkg:software-id/erlang.org/otp", "product": "OTP", "vendor": "Erlang", "versions": [{"changes": [{"at": "27.3.4.17", "status": "unaffected"}, {"at": "28.5.0.6", "status": "unaffected"}, {"at": "29.0.6", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "17.0", "versionType": "otp"}]}, {"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unknown", "packageName": "inets", "packageURL": "pkg:otp/inets?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Ferlang%2Fotp.git", "product": "OTP", "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"changes": [{"at": "9.3.2.7", "status": "unaffected"}, {"at": "9.6.2.3", "status": "unaffected"}, {"at": "9.7.2", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "5.10", "versionType": "otp"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unknown", "packageName": "erlang/otp", "packageURL": "pkg:github/erlang/otp", "product": "OTP", "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"changes": [{"at": "6982e381137ede21a4e1faf5fa2dd82321691176", "status": "unaffected"}, {"at": "c5ccec8ed25c70ec6557fd81277e4b2f52285c19", "status": "unaffected"}, {"at": "6101cb74ff2870718c622ba7af0c100f7f2524e3", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "84adefa331c4159d432d22840663c38f155cd4c1", "versionType": "git"}, {"lessThan": "*", "status": "unaffected", "version": "6982e381137ede21a4e1faf5fa2dd82321691176", "versionType": "git"}, {"lessThan": "*", "status": "unaffected", "version": "c5ccec8ed25c70ec6557fd81277e4b2f52285c19", "versionType": "git"}, {"lessThan": "*", "status": "unaffected", "version": "6101cb74ff2870718c622ba7af0c100f7f2524e3", "versionType": "git"}]}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The mod_auth module in OTP's inets httpd server, when configured with dets or mnesia authentication backends and multiple directory configuration blocks, collapses all directory blocks into a single shared user/group namespace. A user added to one protected directory is accepted as valid for all other protected directories on the same server instance.\n\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a027.3.4.17, OTP\u00a028.5.0.6, and OTP\u00a029.0.6, corresponding to inets from 5.10 before 9.3.2.7, 9.6.2.3, and 9.7.2. Whether OTP before OTP\u00a017.0, corresponding to inets before 5.10, is affected is unknown."}], "id": "CVE-2026-74994", "lastModified": "2026-11-11T14:17:46.877", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.0, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-74994", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-01T15:57:45.946562Z", "version": "2.0.3"}}]}, "published": "2026-09-01T15:17:25.927", "references": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://cna.erlef.org/cves/CVE-2026-74994.html"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/erlang/otp/commit/6101cb74ff2870718c622ba7af0c100f7f2524e3"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/erlang/otp/commit/6982e381137ede21a4e1faf5fa2dd82321691176"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/erlang/otp/commit/c5ccec8ed25c70ec6557fd81277e4b2f52285c19"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/erlang/otp/security/advisories/GHSA-c3cq-q8x6-547g"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://osv.dev/vulnerability/EEF-CVE-2026-74994"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"}], "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}, {"lang": "en", "value": "CWE-1289"}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}

{"bugzilla": {"description": "inets: otp: inets httpd mod_auth: Authentication Bypass via Directory Namespace Collapse", "id": "2526857", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526857"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-1220", "details": ["The mod_auth module in OTP's inets httpd server, when configured with dets or mnesia authentication backends and multiple directory configuration blocks, collapses all directory blocks into a single shared user/group namespace. A user added to one protected directory is accepted as valid for all other protected directories on the same server instance.\nThis issue affects OTP from OTP\u00a017.0 before OTP\u00a027.3.4.17, from OTP\u00a028.0 before OTP\u00a028.5.0.6, and from OTP\u00a029.0 before OTP\u00a029.0.6, corresponding to inets from 5.10 before 9.3.2.7, from 9.4 before 9.6.2.3, and from 9.7 before 9.7.2. Whether OTP before OTP\u00a017.0, corresponding to inets before 5.10, is affected is unknown.", "A flaw was found in the `mod_auth` module of OTP's inets httpd server. When configured with multiple directory configuration blocks and using `dets` or `mnesia` authentication backends, the module incorrectly collapses all directory blocks into a single shared user/group namespace. This allows a user authenticated for one protected directory to gain unauthorized access to other protected directories on the same server instance, leading to an authentication bypass."], "name": "CVE-2026-74994", "package_state": [{"cpe": "cpe:/a:redhat:cryostat:4", "fix_state": "Fix deferred", "package_name": "cryostat/cryostat-storage-rhel9", "product_name": "Cryostat 4"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Fix deferred", "package_name": "rhacm2/volsync-rhel9", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "erlang27", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:openshift_devspaces:3", "fix_state": "Fix deferred", "package_name": "devspaces/traefik-rhel9", "product_name": "Red Hat OpenShift Dev Spaces"}], "public_date": "2026-09-01T14:45:57Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74994\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74994\nhttps://cna.erlef.org/cves/CVE-2026-74994.html\nhttps://github.com/erlang/otp/commit/6101cb74ff2870718c622ba7af0c100f7f2524e3\nhttps://github.com/erlang/otp/commit/6982e381137ede21a4e1faf5fa2dd82321691176\nhttps://github.com/erlang/otp/commit/c5ccec8ed25c70ec6557fd81277e4b2f52285c19\nhttps://github.com/erlang/otp/security/advisories/GHSA-c3cq-q8x6-547g\nhttps://osv.dev/vulnerability/EEF-CVE-2026-74994"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[17.0,27.3.4.17)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[28.0,28.5.0.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[29.0,29.0.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[5.10,9.3.2.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[9.4,9.6.2.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[9.7,9.7.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "code_commit", "value": "6982e381137ede21a4e1faf5fa2dd82321691176"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "code_commit", "value": "c5ccec8ed25c70ec6557fd81277e4b2f52285c19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "code_commit", "value": "6101cb74ff2870718c622ba7af0c100f7f2524e3"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "84adefa331c4159d432d22840663c38f155cd4c1"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "erlang/otp", "vendor": "erlang"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[17.0,27.3.4.17)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[28.0,28.5.0.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[29.0,29.0.6)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "OTP", "source": "cna", "vendor": "Erlang"}, "product": "otp", "vendor": "erlang"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[5.10,9.3.2.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[9.4,9.6.2.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[9.7,9.7.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "OTP", "source": "cna", "vendor": "Erlang"}, "product": "otp", "vendor": "erlang"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "code_commit", "value": "6982e381137ede21a4e1faf5fa2dd82321691176"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "code_commit", "value": "c5ccec8ed25c70ec6557fd81277e4b2f52285c19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "code_commit", "value": "6101cb74ff2870718c622ba7af0c100f7f2524e3"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "84adefa331c4159d432d22840663c38f155cd4c1"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "OTP", "source": "cna", "vendor": "Erlang"}, "product": "otp", "vendor": "erlang"}], "created": "2026-09-01T17:15:05.385102+00:00", "updated": "2026-09-03T14:30:05.607752+00:00", "vendors": ["erlang", "erlang$PRODUCT$erlang/otp", "erlang$PRODUCT$otp"]}