CRITICAL

CVE-2026-68525

Apache Tomcat: Redirect after FORM auth may bypass method specific constraints

CVSS v3

9.1

CRITICAL

EPSS Score

0.5 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

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.

Packages

org.apache.tomcat:tomcatMavenfrom 9.0.0-M1 · fixed in 9.0.121and 2 other packages
tomcatBitnamiall versions · fixed in 9.0.121

Vendor advisories

CVE-2026-68525 Red Hat Product Security110 products fixed · 65 known affected
tomcat: Apache Tomcat: Unauthorized resource access via FORM authentication bypass
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
RHSA-2026:76952 Red Hat Product Security33 products fixed
Red Hat Security Advisory: Red Hat JBoss Web Server 7.0.2 release and security update
RHSA-2026:76956 Red Hat Product Security1 product fixed
Red Hat Security Advisory: Red Hat JBoss Web Server 7.0.2 release and security update
RHSA-2026:73981 Red Hat Product Security33 products fixed
Red Hat Security Advisory: Red Hat JBoss Web Server 6.2.5 release and security update
RHSA-2026:73982 Red Hat Product Security1 product fixed
Red Hat Security Advisory: Red Hat JBoss Web Server 6.2.5 release and security update
RHSA-2026:63137 Red Hat Product Security21 products fixed
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

1 more advisory

Full record on NVD

Description

Incorrect Authorization vulnerability in Apache Tomcat's FORM authentication process allows the bypassing of a security constraint that limits user has access to a resource POST but not GET. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fixes the issue.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published: 2026-08-25
Last Modified: 2026-08-26

Frequently asked questions

What is CVE-2026-68525?

Is CVE-2026-68525 actively exploited?

Active exploitation of CVE-2026-68525 has not been confirmed. Its EPSS score was 0.5% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-68525?

CVE-2026-68525 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

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