SB2026082575 - Multiple vulnerabilities in Apache APISIX

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026082575

SB2026082575 - Multiple vulnerabilities in Apache APISIX

Published: August 25, 2026

Security Bulletin ID SB2026082575
CSH Severity
High
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Input validation error (CVE-ID: CVE-2026-39998)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 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]


The vulnerability allows a remote attacker to spoof identity headers.

The vulnerability exists due to improper input validation in the forward-auth plugin when processing requests under certain configurations. A remote attacker can send crafted headers to spoof identity headers.

Exploitation is possible only when the forward-auth plugin is used with certain configurations.


2) Use of Less Trusted Source (CVE-ID: CVE-2026-44046)

CWE-ID: CWE-348 - Use of Less Trusted Source

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to spoof identity information and bypass IP-based access control rules.

The vulnerability exists due to use of a less trusted source in the wolf-rbac plugin when processing identity information under the default configuration. A remote attacker can supply spoofed identity information to spoof identity information and bypass IP-based access control rules.

The issue can also lead to log pollution with spoofed identity information.


3) Insufficient verification of data authenticity (CVE-ID: CVE-2026-44087)

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

CVSSv4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to gain unauthorized access to protected resources.

The vulnerability exists due to insufficient verification of data authenticity in the openid-connect plugin when processing identity headers under the default configuration. A remote attacker can spoof identity headers to gain unauthorized access to protected resources.

Only the default configuration of the openid-connect plugin is affected.


4) Authentication Bypass by Spoofing (CVE-ID: CVE-2026-39999)

CWE-ID: CWE-290 - Authentication Bypass by Spoofing

CVSSv4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to bypass authentication.

The vulnerability exists due to improper authentication in jwt-auth plugin when processing certain configurations of JWT authentication. A remote attacker can spoof authentication data to bypass authentication.


Remediation

Install update from vendor's website.

References