CVE-2026-29145: CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled vulnerabili

This month

CRITICAL 9.1REMOTEWATCHLISTUPGRADEUPGRADE

CVE-2026-29145 is a critical-severity flaw (CVSS 9.1) affecting tomcat, tomcat native. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled vulnerability in Apache Tomcat, Apache Tomcat Native. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M7 through 10.1.52, from 9.0.83 through 9.0.115; Apache Tomcat Native: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39, from 1.3.0 through 1.3.6, from 2.0.0 through 2.0.13. Users are recommended to upgrade to ve

Why this priority

Critical severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-287
Published	2026-04-09
Last modified	2026-10-26

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-09 20:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

apache tomcat UPGRADE

Affected: >= 9.0.83 and < 9.0.116 · >= 10.1.1 and < 10.1.53 · >= 11.0.0 and < 11.0.20 · 10.1.0 · 10.1.0 milestone10 · 10.1.0 milestone11 · 10.1.0 milestone12 · 10.1.0 milestone13

Fixed in: 9.0.116, 10.1.53, 11.0.20

Safe to downgrade to: a release before 9.0.83

1. Check installed version

apt-cache policy tomcat || rpm -q tomcat || tomcat --version

2. UPGRADE to 9.0.116 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tomcat

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tomcat

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 9.0.83 (Debian / Ubuntu)

apt-cache madison tomcat sudo apt install tomcat=<VERSION_BEFORE_9.0.83> sudo apt-mark hold tomcat

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list tomcat sudo dnf downgrade tomcat-<VERSION_BEFORE_9.0.83> sudo dnf versionlock add tomcat

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

apache tomcat native UPGRADE

Affected: >= 1.1.23 and < 1.3.7 · >= 2.0.0 and < 2.0.14

Fixed in: 1.3.7, 2.0.14

Safe to downgrade to: a release before 1.1.23

1. Check installed version

apt-cache policy tomcat-native || rpm -q tomcat-native || tomcat-native --version

2. UPGRADE to 1.3.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tomcat-native

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tomcat-native

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.1.23 (Debian / Ubuntu)

apt-cache madison tomcat-native sudo apt install tomcat-native=<VERSION_BEFORE_1.1.23> sudo apt-mark hold tomcat-native

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list tomcat-native sudo dnf downgrade tomcat-native-<VERSION_BEFORE_1.1.23> sudo dnf versionlock add tomcat-native

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-29145?

tomcat: upgrade to 9.0.116, 10.1.53, 11.0.20; tomcat native: upgrade to 1.3.7, 2.0.14. Exact commands for each OS are on this page.

Is CVE-2026-29145 being exploited?

CVE-2026-29145 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-29145 affect?

CVE-2026-29145 affects tomcat, tomcat native. Severity is critical (CVSS 9.1). CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled vulnerability in Apache Tomcat, Apache Tomcat Native. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M7 throu

How urgent is CVE-2026-29145?

Priority 55/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Apache Tomcat vulnerabilities

Related CVEs

CVE-2026-34486 HIGH 7.5 EXPLOITED DOWNGRADE DOWNGRADE Apache Tomcat Missing Encryption of Sensitive Data Vulnerability
CVE-2026-29146 HIGH 7.5 UPGRADE Padding Oracle vulnerability in Apache Tomcat's EncryptInterceptor with default configuration. This issue aff
CVE-2026-25854 MEDIUM 6.1 UPGRADE Occasional URL redirection to untrusted Site ('Open Redirect') vulnerability in Apache Tomcat via the LoadBala
CVE-2026-24880 HIGH 7.5 UPGRADE Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomca
CVE-2026-34483 HIGH 7.5 UPGRADE Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve component of Apache Tomcat. T

References

← Back to latest CVEs