Improper Neutralization of Special Elements in Output Used by a Downstream Component in Apache APISIX - CVE-2026-31908
Published: August 25, 2026
Vulnerability identifier: #VU145321
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-31908
CWE-ID: CWE-74
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to inject malicious headers.
The vulnerability exists due to improper neutralization of input in the forward-auth plugin when processing certain configurations. A remote attacker can supply crafted header values to inject malicious headers.
Exploitation depends on certain forward-auth plugin configurations.
Affected software
Apache APISIX
How to mitigate CVE-2026-31908
Install security update from vendor's website.
Apache APISIX - update to 3.16.0