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CVE-2026-43514 Apache Tomcat

Affected softwareApache Tomcat
Severity3.7 Low CVSS 3.1
Fixed in9.0.118, 10.1.55, 11.0.22
WeaknessCWE-208
Published12 May 2026
Updated26 Oct 2026

Description

Observable Timing Discrepancy vulnerability when comparing AJP secret in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Older unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

Exploitation status

No public exploit

No exploit has been reported in the sources we check.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC none indexed
  • EPSS 0.35% chance in 30 days

Waratek protection

No exploit published

Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.

A public code fix exists: apache/tomcat 933dcdb.

  • Protection none
  • Action unverified
  • Review automated Upstream data
  • Record active
Decided by Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all
Finding This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update October 2026 ↗ CPU 2026-Q4 Oracle Communications / Microservices (Apache Tomcat) (7.0.0)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Communications Microservices (Apache Tomcat) 7.0.0 7.0.0

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.apache.tomcat.embed:tomcat-embed-core 0 9.0.118 unbounded
org.apache.tomcat.embed:tomcat-embed-core 10.1.0-M1 10.1.55 unbounded
org.apache.tomcat.embed:tomcat-embed-core 11.0.0-M1 11.0.22 unbounded
org.apache.tomcat:tomcat 0 9.0.118 unbounded
org.apache.tomcat:tomcat 10.1.0-M1 10.1.55 unbounded
org.apache.tomcat:tomcat 11.0.0-M1 11.0.22 unbounded
org.apache.tomcat:tomcat-catalina 0 9.0.118 unbounded
org.apache.tomcat:tomcat-catalina 10.1.0-M1 10.1.55 unbounded
org.apache.tomcat:tomcat-catalina 11.0.0-M1 11.0.22 unbounded

Products and versions

4 products, 14 version entries
SourceVendorProductSchemeAffected versions
nvd apache tomcat generic ≥ 7.0.0 and ≤ 7.0.109 · ≥ 8.5.0 and ≤ 8.5.100 · ≥ 9.0.0 and < 9.0.118 · ≥ 10.1.0 and < 10.1.55 · ≥ 11.0.0 and < 11.0.22
osv org.apache.tomcat tomcat generic < 9.0.118 · ≥ 10.1.0 and < 10.1.55 · ≥ 11.0.0 and < 11.0.22
osv org.apache.tomcat tomcat-catalina generic < 9.0.118 · ≥ 10.1.0 and < 10.1.55 · ≥ 11.0.0 and < 11.0.22
osv org.apache.tomcat.embed tomcat-embed-core generic < 9.0.118 · ≥ 10.1.0 and < 10.1.55 · ≥ 11.0.0 and < 11.0.22

References

URLTags
https://github.com/apache/tomcat/commit/933dcdbf2515972280002929e7e597dead2e9ffa WEB
https://github.com/apache/tomcat/commit/a102a2a157868ca51d83eaf5a119ccd9976a113e WEB
https://github.com/apache/tomcat/commit/d35d9d23263c8e4af561f615c960c91697ff200e WEB
https://github.com/apache/tomcat PACKAGE
https://lists.apache.org/thread/2k654v5cq123npfsd1b2kk1y30owqb1m WEB
https://tomcat.apache.org/security-10.html WEB
https://tomcat.apache.org/security-11.html WEB
https://tomcat.apache.org/security-9.html WEB
http://www.openwall.com/lists/oss-security/2026/05/12/10 WEB

Timeline

Published2026-05-12By the CVE Program.
NVD record modified2026-10-26NVD's own last-modified date for this record.