CVE-2026-55955
Vendor advisory only; no exploitation or PoC; aggregator-driven chatter dominates.
What: Improper Authentication vulnerability in Apache Tomcat EncryptionInterceptor allows replay attacks in cluster deployments across versions 7.0.100–11.0.22 (CVSS/EPSS not yet assigned).
Why it matters: Published 29 Jun 2026; Apache has released patches (11.0.23, 10.1.56, 9.0.119). No KEV listing, no public PoC, no in-the-wild exploitation reports yet. Social chatter is primarily vendor advisory summaries and vulnerability notice aggregation—early-stage awareness rather than active exploitation signal.
Where it's seen: Security bulletin feeds, multilingual vulnerability aggregators, Apache mailing list cross-posts, and patch management tracking sites. No researcher PoC, no defender triage requests, no scanning reports.
RISK: MODERATE — Cluster authentication bypass possible; patched versions available; low adoption urgency absent.
Description
Improper Authentication vulnerability in Apache Tomcat allowed a replay attack against the EncryptionInterceptor in the cluster component. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.13 through 9.0.18, from 8.5.38 through 8.5.100, from 7.0.100 through 7.0.109. Users are recommended to upgrade to version 11.0.23, 10.1.56, 9.0.119, which fixes the issue.