CVE-2026-31908

criticalpriority · track · 10EPSS 0.005 · 44 %ileexploit · PoCEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.52% (44th) EPSS

CVSS 9.1 · critical

Is it mine?

4 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.6–9.1

v3.19.1criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondaryexploitability 3.9 · impact 5.2

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:Psecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-75USCWE-93US

exploits (1)

Public proof-of-concept and weaponised exploit code.

MehranTurk/CVE-2026-31908This proof-of-concept (PoC) exploit targets CVE-2026-31908, a critical header injection vulnerability affecting Apache APISIX versions 2.12.0 through 3.15.0PoC · poc_in_github

affected products (4)

Products and version ranges known to be affected.

Apache Software Foundation Apache APISIX≤ 2.12.0 ≤3.15.0enisa_euvdEU
Apache Software Foundation APISIX2.12.0 → 3.16.0fstec_bduRU
apache apisix2.12.0 → 3.16.0nvdUScpe:2.3:a:apache:apisix:*:*:*:*:*:*:*:*
Bitnami apisix2.12.0 → 3.16.0osvUSpkg:bitnami/apisix

advisories (1)

Vendor and ecosystem advisories describing this.

BIT-apisix-2026-31908Apache APISIX: forward auth plugin allows header injection2026-04-16vendor · osvUS
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.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd osv NVD CVE.org MITRE

published 2026-04-14modified 2026-10-26

references (6)

External citations — patches, advisories, analysis.

scry

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