Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Apache Tomcat versions 8.5.30 through 8.5.100, 9.0.0.M23 through 9.0.115, 10.1.0-M1 through 10.1.52, and 11.0.0-M1 through 11.0.18 are affected by an open redirect flaw in the LoadBalancerDrainingValve. The source does not describe what an attacker must do to trigger it, and says that other unsupported versions may also be affected. Upgrade to Tomcat 9.0.116, 10.1.53, or 11.0.20, which fix the issue.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.1 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.0058, the 48th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:16 UTC First seen by agentprime
- 31 Oct 2026, 14:16 UTC Confirmed by OSV