Skip to main content
VulnerabilityPublished Updated

CVE-2026-73581: Apache Tomcat · Improper Check for Certificate Revocation

Affects Apache TomcatSource CVE Database V5

0
Compare

Not known to be exploited · CVSS 6.5 Medium · fixed in 11.0.26 : update Apache Tomcat when convenient.

Data as of 6 Nov 2026, 23:24 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CISA-ADPCVSS 3.16.5
EPSS
0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 11.0.26, 10.1.59, 9.0.122 +1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 7 Nov 2026.

What to do

Upgrade org.apache.tomcat/tomcat to 11.0.26, 10.1.59, 9.0.122 or 8.5.101.

Affected software

ProductAffectedFixed in
Apache Software FoundationApache TomcatAffected
  • >=11.0.0-M1 <=11.0.25
  • >=10.1.0-M1 <=10.1.59
  • >=9.0.0.M1 <=9.0.121
  • >=8.5.0 <=8.5.100
Fixed in–
Mavenorg.apache.tomcat/tomcatpkg:maven/org.apache.tomcat/tomcatOther threatsAffected
  • >=11.0.0-M1 <11.0.26
  • >=10.1.0-M1 <10.1.59
  • >=9.0.0-M1 <9.0.122
  • >=8.5.0 <8.5.101
Fixed in
  • 11.0.26
  • 10.1.59
  • 9.0.122
  • 8.5.101

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Users should upgrade affected Apache Tomcat versions to the fixed releases: 11.0.26, 10.1.59, 9.0.122, or 8.5.101. Applying these official fixes will resolve the improper certificate revocation checking issue. No additional mitigations are specified by the vendor.

Description

CVE-2026-73581 is an improper check for certificate revocation vulnerability in Apache Tomcat's TLS implementations using OpenSSL and OpenSSL-FFM. The issue causes the system to ignore Certificate Revocation Lists (CRLs) when certificates use a keystore, potentially allowing revoked certificates to be accepted. This affects multiple Apache Tomcat versions from 8.5.0 through 11.0.25. Fixed versions include 11.0.26, 10.1.59, 9.0.122, and 8.5.101.

References

Community reviews

Loading reviews…