CVE-2026-26080

{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-26080", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-07-20T18:16:43.967Z", "dateReserved": "2026-02-11T00:00:00.000Z", "datePublished": "2026-07-20T00:00:00.000Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "HAProxy", "vendor": "HAProxy", "versions": [{"lessThan": "3.2.12", "status": "affected", "version": "3.2", "versionType": "custom"}, {"lessThan": "3.3.3", "status": "affected", "version": "3.3", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "HAProxy Community Edition 3.2.x through 3.3.x before 3.3.3 can enter a loop or crash because varint is mishandled. HAProxy Enterprise and ALOHA are also affected."}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-252", "description": "CWE-252 Unchecked Return Value", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-07-20T15:33:31.368Z"}, "references": [{"url": "https://www.haproxy.org"}, {"url": "https://git.haproxy.org/?p=haproxy-3.2.git;a=commit;h=5bb098ce8a656ec5711b4de3e4c87f12b216e7a1"}], "x_generator": {"engine": "enrichogram 0.0.1"}, "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "3.2.12"}, {"vulnerable": true, "criteria": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.3", "versionEndExcluding": "3.3.3"}]}]}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-20T18:16:29.299899Z", "id": "CVE-2026-26080", "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": "2026-07-20T18:16:43.967Z"}}]}, "dataVersion": "5.2"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-26080", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-20T18:16:29.299899Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-20T18:16:36.877Z"}}], "cna": {"metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 3.7, "attackVector": "NETWORK", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "HAProxy", "product": "HAProxy", "versions": [{"status": "affected", "version": "3.2", "lessThan": "3.2.12", "versionType": "custom"}, {"status": "affected", "version": "3.3", "lessThan": "3.3.3", "versionType": "custom"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://www.haproxy.org"}, {"url": "https://git.haproxy.org/?p=haproxy-3.2.git;a=commit;h=5bb098ce8a656ec5711b4de3e4c87f12b216e7a1"}], "x_generator": {"engine": "enrichogram 0.0.1"}, "descriptions": [{"lang": "en", "value": "HAProxy Community Edition 3.2.x through 3.3.x before 3.3.3 can enter a loop or crash because varint is mishandled. HAProxy Enterprise and ALOHA are also affected."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-252", "description": "CWE-252 Unchecked Return Value"}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "3.2.12", "versionStartIncluding": "3.2"}, {"criteria": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "3.3.3", "versionStartIncluding": "3.3"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-07-20T15:33:31.368Z"}}}, "cveMetadata": {"cveId": "CVE-2026-26080", "state": "PUBLISHED", "dateUpdated": "2026-07-20T18:16:43.967Z", "dateReserved": "2026-02-11T00:00:00.000Z", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "datePublished": "2026-07-20T00:00:00.000Z", "assignerShortName": "mitre"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "HAProxy", "vendor": "HAProxy", "versions": [{"lessThan": "3.2.12", "status": "affected", "version": "3.2", "versionType": "custom"}, {"lessThan": "3.3.3", "status": "affected", "version": "3.3", "versionType": "custom"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*", "matchCriteriaId": "4B1493FD-C53C-4CE2-A510-B0CD367899D8", "versionEndExcluding": "3.2.12", "versionStartIncluding": "3.2", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*", "matchCriteriaId": "62995296-DBA7-4C11-B121-B6A54FFF883E", "versionEndExcluding": "3.3.3", "versionStartIncluding": "3.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:haproxy:aloha:*:*:*:*:*:*:*:*", "matchCriteriaId": "24B20024-991F-4811-9DA7-A5285D150276", "versionEndExcluding": "17.0.18", "versionStartIncluding": "17.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:aloha:*:*:*:*:*:*:*:*", "matchCriteriaId": "6CC6D43E-DD3A-476A-8ADD-E17172E39D7F", "versionEndExcluding": "17.5.16", "versionStartIncluding": "17.5.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.334:*:*:*:*:*:*", "matchCriteriaId": "9612E73F-5790-4A1F-A2C5-433BF1774AC2", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.336:*:*:*:*:*:*", "matchCriteriaId": "2952B8E0-B42C-40CC-A65A-B36C3E9F3D05", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.347:*:*:*:*:*:*", "matchCriteriaId": "C1B62FD2-2330-453F-BA70-484D1B7070FB", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.355:*:*:*:*:*:*", "matchCriteriaId": "1EEB78AA-28A5-4379-968C-06586BD364ED", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.376:*:*:*:*:*:*", "matchCriteriaId": "7197F987-D00B-4813-96FA-8021837D74E2", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.385:*:*:*:*:*:*", "matchCriteriaId": "1EC14458-868F-4E31-A05D-1915CDFBA2FA", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-353.398:*:*:*:*:*:*", "matchCriteriaId": "75189C3E-AD66-4FB9-996C-413BDE9E813E", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-354.402:*:*:*:*:*:*", "matchCriteriaId": "78085408-69CC-474D-9384-98D51C0CE84C", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-354.439:*:*:*:*:*:*", "matchCriteriaId": "7A7D3C8C-27EE-4BBD-8BFC-5EE01D3EB2CB", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-358.439:*:*:*:*:*:*", "matchCriteriaId": "BA7668BC-34EE-4524-B2A0-862FF8A7FA63", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-359.440:*:*:*:*:*:*", "matchCriteriaId": "597390EB-CAE0-4926-86D5-A72E88B699E5", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-360.460:*:*:*:*:*:*", "matchCriteriaId": "CA3DAE64-AFFE-4F7D-9285-1CF9E77D64B5", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-362.473:*:*:*:*:*:*", "matchCriteriaId": "05494560-7CF0-471A-BF9E-3DCE92137E00", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-363.476:*:*:*:*:*:*", "matchCriteriaId": "7900E687-83BF-40C1-8E07-ECC4AD628029", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-363.478:*:*:*:*:*:*", "matchCriteriaId": "EC300D02-36F7-46C8-8613-D0992A1F01E5", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-363.498:*:*:*:*:*:*", "matchCriteriaId": "D27C0E49-CFA5-487C-8925-A647F9A4C0F6", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-363.511:*:*:*:*:*:*", "matchCriteriaId": "8F9AFC1E-49A5-4B46-AD5E-65C188F4CD8F", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-365.529:*:*:*:*:*:*", "matchCriteriaId": "26145D01-6E25-4D77-81C9-6EBFFCC59738", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-365.531:*:*:*:*:*:*", "matchCriteriaId": "1FF50A08-176A-4868-9FC9-A73242309290", "vulnerable": true}, {"criteria": "cpe:2.3:a:haproxy:haproxy_enterprise:3.2r1:1.0.0-365.545:*:*:*:*:*:*", "matchCriteriaId": "379630E9-8313-4D6A-9424-51B7FE778134", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "HAProxy Community Edition 3.2.x through 3.3.x before 3.3.3 can enter a loop or crash because varint is mishandled. HAProxy Enterprise and ALOHA are also affected."}], "id": "CVE-2026-26080", "lastModified": "2026-08-25T15:43:56.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "cve@mitre.org", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-26080", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-20T18:16:29.299899Z", "version": "2.0.3"}}]}, "published": "2026-07-20T16:16:57.057", "references": [{"source": "cve@mitre.org", "tags": ["Patch", "Vendor Advisory"], "url": "https://git.haproxy.org/?p=haproxy-3.2.git;a=commit;h=5bb098ce8a656ec5711b4de3e4c87f12b216e7a1"}, {"source": "cve@mitre.org", "tags": ["Product"], "url": "https://www.haproxy.org"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-252"}], "source": "cve@mitre.org", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[3.2,3.2.12)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[3.3,3.3.3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "inferred", "scores": [{"score": 100.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "HAProxy", "source": "cna", "vendor": "HAProxy"}, "product": "haproxy", "vendor": "haproxy"}], "created": "2026-07-20T22:45:17.215208+00:00", "title": "Varint Handling Bug Causes Infinite Loop or Crash in HAProxy Community Edition", "updated": "2026-08-03T01:30:16.695183+00:00", "vendors": ["haproxy", "haproxy$PRODUCT$haproxy"]}