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CVE

CVE-2026-65905

Apache Tomcat: Limited replay attack possible with DIGEST authentication
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CVE

CVE-2026-65905

Apache Tomcat: Limited replay attack possible with DIGEST authentication

Authentication Bypass by Capture-replay vulnerability in Apache Tomcat's DIGEST authenticator. If, before windowSize requests have been made, a client makes a DIGEST 

authenticated request with a nonceCount on the upper boundary of the 

replay window then that request is replayable once only while the 

associated nonceCount remains within the replay window.

​

 

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 7.0.30 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 fix the issue.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

http://www.openwall.com/lists/oss-security/2026/08/26/4, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65905.json, https://lists.apache.org/thread/9v114xlpgbzrrbzz5vf9f6r2q4wnxwwj, https://nvd.nist.gov/vuln/detail/CVE-2026-65905

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00562%
EPSS Percentile
0.44994%
Introduced Version
86ecd2ad87b805992b9e4c2f2317feaab7a1e3fb,0
Fix Available
9.0.70-2,8.8.37-r1,8.9.18-r1,8.6.39-r12,8.7.38-r1,3.32.1-r7,3.32.1-r5,2025.2.4-r9,2025.4.6-r14,2026.0.7-r4,2026.1.2-r5,2026.2.5-r1,2025.4.6-r8,2026.0.5-r3,2026.2.5-r2,3.2.4-r1,5.5.0-r23,5.5.0-r17,4.3.1.4-r2

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