CVE-2026-93446
No exploitation reported by the sources we read.
- Published2026-10-20
- Fixed in11.0.27 · 10.1.61 · 9.0.123
- WeaknessCWE-459
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Incomplete cleanup vulnerability in Apache Tomcat could cause TLS 1.3 connections to fail intermittently. This issue affects Apache Tomcat: from 11.0.0-M21 through 11.0.26, from 10.1.25 through 10.1.60, from 9.0.90 through 9.0.122. Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fix the issue.
Timeline
dates in UTC- 2026-10-2014:17CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-30 09:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-93446?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-93446?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
OSV| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 11.0 | ≥ 11.0.0, < 11.0.27 | 11.0.27 | OSV |
| 10.1 | ≥ 10.1.25, < 10.1.61 | 10.1.61 | OSV |
| 9.0 | ≥ 9.0.90, < 9.0.123 | 9.0.123 | OSV |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
tomcat: Apache Tomcat: Possible TLS 1.3 connection failures
tomcat as a component of Red Hat Enterprise Linux 10 · tomcat-admin-webapps as a component of Red Hat Enterprise Linux 10 · tomcat-docs-webapp as a component of Red Hat Enterprise Linux 10 · +87 more
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Fix
- Update tomcat to 11.0.27 · 10.1.61 · 9.0.123
- Vendor fix Red Hat Product Security CVE-2026-93446 · 31 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
- Workaround from the vendor Red Hat Product Security CVE-2026-93446 · 152 productsConfigure Tomcat's SSLHostConfig or connector configuration in server.xml to temporarily disable TLS 1.3 by restricting sslProtocols to TLSv1.2, or terminate TLS 1.3 connections at an upstream reverse proxy or load balancer.
- No fix available, says the vendor Red Hat Product Security CVE-2026-93446 · 90 productsFix deferred
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2026-10-20
- Last Modified
- 2026-10-29
- NVD status
- Awaiting Analysis
Frequently asked questions
What is CVE-2026-93446?
Is CVE-2026-93446 actively exploited?
What is the CVSS score for CVE-2026-93446?
Running Apache Tomcat? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
No credit card required · No monthly cap on website lookups · 250 API requests/month
Go further
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
- Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.
Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.