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CVE-2026-31908

Header injection vulnerability in Apache APISIX. The attacker can take advantage of certain configuration in forward-auth plugin to inject malicious headers. This issue affects Apache APISIX: from 2.12.0 through 3.15.0. Users are recommended to upgrade to version 3.16.0, which fixes the issue.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d4837b52f15cd11d95e149181f4b9b131d48f31e7ca1a18e6954d40e71180e74
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"Apache APISIX","vendor":"Apache Software Foundation","versions":[{"lessThanOrEqual":"3.15.0","status":"affected","version":"2.12.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a00288044b4a9e633ae34aab6dc02c5b8ea6b82ae62e51fe77f6d878a1f80e74 · sha256:9a6f30f69e195049… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"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"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a00288044b4a9e633ae34aab6dc02c5b8ea6b82ae62e51fe77f6d878a1f80e74 · sha256:9a6f30f69e195049… · /containers/adp/1/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-75","description":"CWE-75 Failure to Sanitize Special Elements into a Different Plane (Special Element Injection)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a00288044b4a9e633ae34aab6dc02c5b8ea6b82ae62e51fe77f6d878a1f80e74 · sha256:9a6f30f69e195049… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/04/14/3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a00288044b4a9e633ae34aab6dc02c5b8ea6b82ae62e51fe77f6d878a1f80e74 · sha256:9a6f30f69e195049… · /containers/adp/0/references/0
{"tags":["vendor-advisory"],"url":"https://lists.apache.org/thread/sob643s5lztov7x579j8o0c444t36n6b"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a00288044b4a9e633ae34aab6dc02c5b8ea6b82ae62e51fe77f6d878a1f80e74 · sha256:9a6f30f69e195049… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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