CVE-2026-42498
high
CVSS v3
7.3
CVSS v2
—
VIR risk
7.3
Description
Apache Tomcat - WebSocket authentication header exposure
Predictions
Exploit likelihood
82%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-42498
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-42498.html
Vendor advisory: security@apache.org — https://lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdb
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 9.0.70-2 |
| debian | bullseye | fixed | 9.0.70-2 |
| debian | forky | fixed | 9.0.70-2 |
| debian | sid | fixed | 11.0.22-1 |
| debian | trixie | fixed | 9.0.70-2 |
Package impact
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| apache | tomcat | {"startIncluding":"7.0.0","endIncluding":"7.0.109"} | |
References
- https://lists.apache.org/thread/n61zwf75jrv09rz90j4jssncm244bwdb
- http://www.openwall.com/lists/oss-security/2026/05/12/14
- https://nvd.nist.gov/vuln/detail/CVE-2026-42498
- https://github.com/apache/tomcat/commit/169d725788ea6aec217ecac70fe4161c837ba423
- https://github.com/apache/tomcat/commit/6cbe274592ef2d11607b5b188e1df649de52f8d5
- https://github.com/apache/tomcat/commit/b7b173694d588ddcfa432f079baf763cbbbaa5c4
- https://github.com/apache/tomcat
- https://tomcat.apache.org/security-10.html
- https://tomcat.apache.org/security-11.html
- https://tomcat.apache.org/security-9.html
- https://www.suse.com/security/cve/CVE-2026-42498.html
- https://security-tracker.debian.org/tracker/CVE-2026-42498
- https://github.com/advisories/GHSA-fv25-8xcx-gqjc
CWEs
CWE-200
Verify integrity in audit chain (admin only). AS-IS.