CVE-2026-21622

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When a user requests a password reset, Hex sends an email containing a reset link with a token. This token remains valid indefinitely until used. There is no time-based expiration enforced.</p><p>If a user's historical emails are exposed through a data breach (e.g., a leaked mailbox archive), any unused password reset email contained in that dataset could be used by an attacker to reset the victim's password. The attacker does not need current access to the victim's email account, only access to a previously leaked copy of the reset email.</p><p>This vulnerability is associated with program files <tt>lib/hexpm/accounts/password_reset.ex</tt> and program routines <tt>'Elixir.Hexpm.Accounts.PasswordReset':can_reset?/3</tt>.</p><p>This issue affects hexpm: from 617e44c71f1dd9043870205f371d375c5c4d886d before bb0e42091995945deef10556f58d046a52eb7884.</p>"}], "value": "Insufficient Session Expiration vulnerability in hexpm hexpm/hexpm ('Elixir.Hexpm.Accounts.PasswordReset' module) allows Account Takeover.\n\nPassword reset tokens generated via the \"Reset your password\" flow do not expire. When a user requests a password reset, Hex sends an email containing a reset link with a token. This token remains valid indefinitely until used. There is no time-based expiration enforced.\n\nIf a user's historical emails are exposed through a data breach (e.g., a leaked mailbox archive), any unused password reset email contained in that dataset could be used by an attacker to reset the victim's password. The attacker does not need current access to the victim's email account, only access to a previously leaked copy of the reset email.\n\nThis vulnerability is associated with program files lib/hexpm/accounts/password_reset.ex and program routines 'Elixir.Hexpm.Accounts.PasswordReset':can_reset?/3.\n\nThis issue affects hexpm: from 617e44c71f1dd9043870205f371d375c5c4d886d before bb0e42091995945deef10556f58d046a52eb7884."}], "impacts": [{"capecId": "CAPEC-21", "descriptions": [{"lang": "en", "value": "CAPEC-21 Exploitation of Session Variables, Resource IDs and other Trusted Credentials"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 9.5, "baseSeverity": "CRITICAL", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-613", "description": "CWE-613 Insufficient Session Expiration", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-04-21T04:15:20.750Z"}, "references": [{"tags": ["vendor-advisory", "related"], "url": "https://github.com/hexpm/hexpm/security/advisories/GHSA-6r94-pvwf-mxqm"}, {"tags": ["related"], "url": "https://cna.erlef.org/cves/CVE-2026-21622.html"}, {"tags": ["related"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-21622"}, {"tags": ["patch"], "url": "https://github.com/hexpm/hexpm/commit/bb0e42091995945deef10556f58d046a52eb7884"}], "source": {"discovery": "INTERNAL"}, "title": "Password Reset Tokens Do Not Expire", "workarounds": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Users who suspect email exposure should:</p><ul><li>Immediately reset their password.</li><li>Enable and enforce 2FA.</li></ul><p>There is no complete mitigation without implementing token expiration.</p>"}], "value": "Users who suspect email exposure should:\n\n* Immediately reset their password.\n* Enable and enforce 2FA.\n\nThere is no complete mitigation without implementing token expiration."}], "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-03-10T14:35:49.366785Z", "id": "CVE-2026-21622", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-21T02:43:06.195Z"}}]}}

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When a user requests a password reset, Hex sends an email containing a reset link with a token. This token remains valid indefinitely until used. There is no time-based expiration enforced.\n\nIf a user's historical emails are exposed through a data breach (e.g., a leaked mailbox archive), any unused password reset email contained in that dataset could be used by an attacker to reset the victim's password. The attacker does not need current access to the victim's email account, only access to a previously leaked copy of the reset email.\n\nThis vulnerability is associated with program files lib/hexpm/accounts/password_reset.ex and program routines 'Elixir.Hexpm.Accounts.PasswordReset':can_reset?/3.\n\nThis issue affects hexpm: from 617e44c71f1dd9043870205f371d375c5c4d886d before bb0e42091995945deef10556f58d046a52eb7884.", "supportingMedia": [{"type": "text/html", "value": "Insufficient Session Expiration vulnerability in hexpm hexpm/hexpm ('Elixir.Hexpm.Accounts.PasswordReset' module) allows Account Takeover.<p>Password reset tokens generated via the \"Reset your password\" flow do not expire. When a user requests a password reset, Hex sends an email containing a reset link with a token. This token remains valid indefinitely until used. There is no time-based expiration enforced.</p><p>If a user's historical emails are exposed through a data breach (e.g., a leaked mailbox archive), any unused password reset email contained in that dataset could be used by an attacker to reset the victim's password. The attacker does not need current access to the victim's email account, only access to a previously leaked copy of the reset email.</p><p>This vulnerability is associated with program files <tt>lib/hexpm/accounts/password_reset.ex</tt> and program routines <tt>'Elixir.Hexpm.Accounts.PasswordReset':can_reset?/3</tt>.</p><p>This issue affects hexpm: from 617e44c71f1dd9043870205f371d375c5c4d886d before bb0e42091995945deef10556f58d046a52eb7884.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-613", "description": "CWE-613 Insufficient Session Expiration"}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:hexpm:hexpm:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "bb0e42091995945deef10556f58d046a52eb7884", "versionStartIncluding": "617e44c71f1dd9043870205f371d375c5c4d886d"}], "operator": "AND"}], "operator": "AND"}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-04-21T04:15:20.750Z"}}}, "cveMetadata": {"cveId": "CVE-2026-21622", "state": "PUBLISHED", "dateUpdated": "2026-04-21T04:15:20.750Z", "dateReserved": "2026-01-01T03:46:45.934Z", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "datePublished": "2026-03-05T21:18:03.883Z", "assignerShortName": "EEF"}, "dataVersion": "5.2"}

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When a user requests a password reset, Hex sends an email containing a reset link with a token. This token remains valid indefinitely until used. There is no time-based expiration enforced.\n\nIf a user's historical emails are exposed through a data breach (e.g., a leaked mailbox archive), any unused password reset email contained in that dataset could be used by an attacker to reset the victim's password. The attacker does not need current access to the victim's email account, only access to a previously leaked copy of the reset email.\n\nThis vulnerability is associated with program files lib/hexpm/accounts/password_reset.ex and program routines 'Elixir.Hexpm.Accounts.PasswordReset':can_reset?/3.\n\nThis issue affects hexpm: from 617e44c71f1dd9043870205f371d375c5c4d886d before bb0e42091995945deef10556f58d046a52eb7884."}, {"lang": "es", "value": "Vulnerabilidad de expiraci\u00f3n de sesi\u00f3n insuficiente en hexpm hexpm/hexpm (m\u00f3dulo 'Elixir.Hexpm.Accounts.PasswordReset') permite la toma de control de cuentas.\n\nLos tokens de restablecimiento de contrase\u00f1a generados a trav\u00e9s del flujo 'Restablecer su contrase\u00f1a' no expiran. Cuando un usuario solicita un restablecimiento de contrase\u00f1a, Hex env\u00eda un correo electr\u00f3nico que contiene un enlace de restablecimiento con un token. Este token permanece v\u00e1lido indefinidamente hasta que se usa. No se aplica ninguna expiraci\u00f3n basada en el tiempo.\n\nSi los correos electr\u00f3nicos hist\u00f3ricos de un usuario se exponen a trav\u00e9s de una violaci\u00f3n de datos (por ejemplo, un archivo de buz\u00f3n de correo filtrado), cualquier correo electr\u00f3nico de restablecimiento de contrase\u00f1a no utilizado contenido en ese conjunto de datos podr\u00eda ser utilizado por un atacante para restablecer la contrase\u00f1a de la v\u00edctima. El atacante no necesita acceso actual a la cuenta de correo electr\u00f3nico de la v\u00edctima, solo acceso a una copia previamente filtrada del correo electr\u00f3nico de restablecimiento.\n\nEsta vulnerabilidad est\u00e1 asociada con los archivos de programa lib/hexpm/accounts/password_reset.ex y las rutinas de programa 'Elixir.Hexpm.Accounts.PasswordReset':can_reset?/3.\n\nEste problema afecta a hexpm: desde 617e44c71f1dd9043870205f371d375c5c4d886d antes de bb0e42091995945deef10556f58d046a52eb7884."}], "id": "CVE-2026-21622", "lastModified": "2026-06-17T10:18:49.420", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.5, "baseSeverity": "CRITICAL", "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": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/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": "LOW", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-21622", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-10T14:35:49.366785Z", "version": "2.0.3"}}]}, "published": "2026-03-05T22:16:12.963", "references": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://cna.erlef.org/cves/CVE-2026-21622.html"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Patch"], "url": "https://github.com/hexpm/hexpm/commit/bb0e42091995945deef10556f58d046a52eb7884"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Patch", "Vendor Advisory"], "url": "https://github.com/hexpm/hexpm/security/advisories/GHSA-6r94-pvwf-mxqm"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://osv.dev/vulnerability/EEF-CVE-2026-21622"}], "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-613"}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[617e44c71f1dd9043870205f371d375c5c4d886d,bb0e42091995945deef10556f58d046a52eb7884)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[pkg:github/hexpm/hexpm@617e44c71f1dd9043870205f371d375c5c4d886d,pkg:github/hexpm/hexpm@bb0e42091995945deef10556f58d046a52eb7884)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "inferred", "scores": [{"score": 100.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "hexpm", "source": "cna", "vendor": "hexpm"}, "product": "hexpm", "vendor": "hexpm"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[2025-08-01,2026-03-05)"}}], "enrichment": {"confidence": 96.0, "confidence_source": "matching", "scores": [{"score": 96.0, "source": "matching"}]}, "original": {"product": "hex.pm", "source": "cna", "vendor": "hexpm"}, "product": "hexpm", "vendor": "hexpm"}], "analysis": {"en": {"generated_at": "2026-04-15T19:54:47.207354+00:00", "value": {"mitigation_remediation": ["Upgrade Hex.pm to a version derived from commit bb0e42091995945deef10556f58d046a52eb7884 or later, which implements token expiration and removes the flaw.", "If an immediate upgrade is not possible, users who suspect their reset emails have been exposed should reset their password immediately to invalidate the old token.", "Enable and enforce two\u2011factor authentication for all accounts to add a second layer of defense against unauthorized access following a password change."], "summary": {"action": "Patch Now", "impact": "Account Takeover via unused password reset token"}, "threat_synthesis": {"affected_systems": "This vulnerability affects the Hex.pm platform, specifically the hexpm/hexpm repository. All releases built from commit 617e44c71f1dd9043870205f371d375c5c4d886d and earlier are vulnerable. The issue is resolved in the commit bb0e42091995945deef10556f58d046a52eb7884 and any subsequent release.", "description_and_impact": "Password reset tokens generated by Hex.pm\u2019s password reset flow are never automatically invalidated after creation. When a user initiates a reset, an e\u2011mail containing a token is sent and that token remains usable indefinitely until it is consumed. If an attacker obtains a historic copy of such an e\u2011mail, for example through a leaked mailbox archive, the attacker can use the stored token to reset the victim\u2019s password without needing access to the victim's current email account. This capability gives the attacker control over the account, allowing complete takeover with full access to all of the victim\u2019s data and privileges.", "risk_and_exploitability": "With a CVSS score of 9.5 the vulnerability is classified as critical. However, the EPSS score is below 1\u202f% and the vulnerability is not listed in CISA\u2019s KEV catalog, indicating a low current likelihood of exploitation. The attack path is straightforward once an attacker has accessed a leaked password\u2011reset email; they need only click the token link to change the password and assume the account. The risk remains high if such e\u2011mails are exposed, and recovery depends on the organization\u2019s ability to update the software quickly."}}}}, "created": "2026-03-06T15:00:49.605849+00:00", "updated": "2026-04-15T20:00:06.625916+00:00", "vendors": ["hexpm", "hexpm$PRODUCT$hexpm"]}