{"api_version":"1","generated_at":"2026-04-19T08:45:19+00:00","cve":"CVE-2026-31908","urls":{"html":"https://cve.report/CVE-2026-31908","api":"https://cve.report/api/cve/CVE-2026-31908.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31908","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31908"},"summary":{"title":"Apache APISIX: forward auth plugin allows header injection","description":"Header injection vulnerability in Apache APISIX.\n\nThe attacker can take advantage of certain configuration in forward-auth plugin to inject malicious headers.\nThis issue affects Apache APISIX: from 2.12.0 through 3.15.0.\n\nUsers are recommended to upgrade to version 3.16.0, which fixes the issue.","state":"PUBLISHED","assigner":"apache","published_at":"2026-04-14 09:16:35","updated_at":"2026-04-17 18:40:12"},"problem_types":["CWE-75","CWE-75 CWE-75 Failure to Sanitize Special Elements into a Different Plane (Special Element Injection)"],"metrics":[{"version":"3.1","source":"ADP","type":"DECLARED","score":"9.1","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"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:N","version":"3.1"}},{"version":"3.1","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","score":"9.1","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":9.1,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"}}],"references":[{"url":"http://www.openwall.com/lists/oss-security/2026/04/14/3","name":"http://www.openwall.com/lists/oss-security/2026/04/14/3","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Third Party Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://lists.apache.org/thread/sob643s5lztov7x579j8o0c444t36n6b","name":"https://lists.apache.org/thread/sob643s5lztov7x579j8o0c444t36n6b","refsource":"security@apache.org","tags":["Mailing List","Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31908","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31908","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Apache Software Foundation","product":"Apache APISIX","version":"affected 2.12.0 3.15.0 semver","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"SeungMyung Lee","lang":"en"}],"nvd_cpes":[{"cve_year":"2026","cve_id":"31908","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"apache","cpe5":"apisix","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"31908","cve":"CVE-2026-31908","epss":"0.000920000","percentile":"0.259010000","score_date":"2026-04-18","updated_at":"2026-04-19 00:10:43"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"providerMetadata":{"dateUpdated":"2026-04-14T08:37:15.159Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"url":"http://www.openwall.com/lists/oss-security/2026/04/14/3"}],"title":"CVE Program Container"},{"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"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:N","version":"3.1"}},{"other":{"content":{"id":"CVE-2026-31908","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","timestamp":"2026-04-16T11:42:56.365669Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-04-16T12:06:00.176Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Apache APISIX","vendor":"Apache Software Foundation","versions":[{"lessThanOrEqual":"3.15.0","status":"affected","version":"2.12.0","versionType":"semver"}]}],"credits":[{"lang":"en","type":"reporter","value":"SeungMyung Lee"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>Header injection vulnerability in Apache APISIX.</p><span style=\"background-color: rgb(255, 255, 255);\">The attacker can take advantage of certain configuration in forward-auth plugin to inject malicious headers.</span><br><p>This issue affects Apache APISIX: from 2.12.0 through 3.15.0.</p><p>Users are recommended to upgrade to version 3.16.0, which fixes the issue.</p>"}],"value":"Header injection vulnerability in Apache APISIX.\n\nThe attacker can take advantage of certain configuration in forward-auth plugin to inject malicious headers.\nThis issue affects Apache APISIX: from 2.12.0 through 3.15.0.\n\nUsers are recommended to upgrade to version 3.16.0, which fixes the issue."}],"metrics":[{"other":{"content":{"text":"moderate"},"type":"Textual description of severity"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-75","description":"CWE-75 Failure to Sanitize Special Elements into a Different Plane (Special Element Injection)","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-04-14T08:06:18.026Z","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","shortName":"apache"},"references":[{"tags":["vendor-advisory"],"url":"https://lists.apache.org/thread/sob643s5lztov7x579j8o0c444t36n6b"}],"source":{"discovery":"UNKNOWN"},"title":"Apache APISIX: forward auth plugin allows header injection","x_generator":{"engine":"Vulnogram 0.2.0"}}},"cveMetadata":{"assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","assignerShortName":"apache","cveId":"CVE-2026-31908","datePublished":"2026-04-14T08:06:18.026Z","dateReserved":"2026-03-10T08:20:51.948Z","dateUpdated":"2026-04-16T12:06:00.176Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-14 09:16:35","lastModifiedDate":"2026-04-17 18:40:12","problem_types":["CWE-75","CWE-75 CWE-75 Failure to Sanitize Special Elements into a Different Plane (Special Element Injection)"],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":9.1,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":5.2}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:apache:apisix:*:*:*:*:*:*:*:*","versionStartIncluding":"2.12.0","versionEndExcluding":"3.16.0","matchCriteriaId":"FB303E55-AAEE-4906-9701-902E34BEDE2E"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31908","Ordinal":"1","Title":"Apache APISIX: forward auth plugin allows header injection","CVE":"CVE-2026-31908","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31908","Ordinal":"1","NoteData":"Header injection vulnerability in Apache APISIX.\n\nThe attacker can take advantage of certain configuration in forward-auth plugin to inject malicious headers.\nThis issue affects Apache APISIX: from 2.12.0 through 3.15.0.\n\nUsers are recommended to upgrade to version 3.16.0, which fixes the issue.","Type":"Description","Title":"Apache APISIX: forward auth plugin allows header injection"}]}}}