by Kastro
Paper/Archive/CVE-2026-68525

CVE-2026-68525

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

EPSS 0.6%CVSS 9.1
critical.is priorityof 100
38
CVSS 9.1 (ADP)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 50.8.508 × 2010.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Apache Tomcat11.0.0-M1 – 11.0.24–CNA
Apache Tomcat10.1.0-M1 – 10.1.57–CNA
Apache Tomcat9.0.0.M1 – 9.0.120–CNA
Apache Tomcat8.5.0 – 8.5.100–CNA
Apache Tomcat7.0.0 – 7.0.109–CNA

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorylists.apache.org/thread/x1y2lfsgzxwzc456f8954vbvgn03zhd7refopenwall.com/lists/oss-security/2026/08/26/7