CVE-2026-31908CRITICAL 9.1EPSS p40.0%

CVE-2026-31908CVE-2026-31908

Description

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.

Scoring

CVSS 3.19.1 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS0.52% probability of exploitation · percentile 40.0% · 2026-06-19T12:03:05Z
Published2026-04-14
Last modified2026-04-17

Underlying weaknesses· 1

CWE-75

References

  1. https://lists.apache.org/thread/sob643s5lztov7x579j8o0c444t36n6b
  2. http://www.openwall.com/lists/oss-security/2026/04/14/3

1

TypeTargetConfidenceTier
WeaknessFailure to Sanitize Special Elements into a Different Plane (Special Element Injection)cwe-750%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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Apache APISIX Authentication Bypass Vulnerability
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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.