SB2026050536 - Insertion of Sensitive Information Into Sent Data in Traefik
Published: May 5, 2026
Security Bulletin ID
SB2026050536
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Insertion of Sensitive Information Into Sent Data (CVE-ID: CVE-2026-41181)
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to insertion of sensitive information into sent data in the errors middleware when forwarding requests to a separate error page service after a backend response matches the configured status range. A remote attacker can send a request containing sensitive headers to disclose sensitive information.
Only deployments that use the errors middleware with a distinct error page service are affected.
Remediation
Install update from vendor's website.