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High severity8.8NVD Advisory· Published Jun 19, 2026· Updated Jun 23, 2026

CVE-2026-39998

CVE-2026-39998

Description

Improper Input Validation vulnerability in Apache APISIX.

The attacker can take advantage of certain configuration in forward-auth plugin to spoof identity headers. This issue affects Apache APISIX: from 2.12.0 through 3.16.0.

Users are recommended to upgrade to version 3.17.0, which fixes the issue.

Affected products

3
  • Apache/Apisix2 versions
    cpe:2.3:a:apache:apisix:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:apache:apisix:*:*:*:*:*:*:*:*range: >=2.12.0,<3.17.0
    • (no CPE)range: from 2.12.0 through 3.16.0
  • osv-coords
    pkg:bitnami/apisix
    Range: >= 2.12.0, < 3.17.0

Patches

Vulnerability mechanics

References

2

News mentions

1