Input validation error in Apache Answer - CVE-2026-34031
Published: August 25, 2026
Vulnerability identifier: #VU145215
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-34031
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper validation of user-supplied URLs in custom avatar handling when processing profile image URLs. A remote user can supply a crafted external image URL to disclose sensitive information.
This can cause victims' browsers to make unintended requests to third-party servers, enabling external tracking.
Affected software
Apache Answer
How to mitigate CVE-2026-34031
Install security update from vendor's website.
Apache Answer - update to 2.0.1