CVE-2026-65905
Apache Tomcat: Limited replay attack possible with DIGEST authentication
Description
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.
INFO
Published Date :
Aug. 25, 2026, 10:17 p.m.
Last Modified :
Aug. 27, 2026, 3:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Upgrade Apache Tomcat to version 11.0.25, 10.1.58, or 9.0.121.
- Apply vendor-supplied patches for affected Apache Tomcat versions.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-65905.
| URL | Resource |
|---|---|
| https://lists.apache.org/thread/9v114xlpgbzrrbzz5vf9f6r2q4wnxwwj | Vendor Advisory Mailing List |
| http://www.openwall.com/lists/oss-security/2026/08/26/4 | Third Party Advisory Mailing List |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-65905 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-65905
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-65905 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-65905 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 27, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 10.1.0 up to (excluding) 10.1.58 *cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 11.0.0 up to (excluding) 11.0.25 *cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 8.5.0 up to (excluding) 9.0.121 *cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 7.0.30 up to (including) 7.0.109 Added Reference Type Apache Software Foundation: https://lists.apache.org/thread/9v114xlpgbzrrbzz5vf9f6r2q4wnxwwj Types: Mailing List, Vendor Advisory Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/08/26/4 Types: Mailing List, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 26, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added SSVC {'id': 'CVE-2026-65905', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-26T15:20:56.087834Z'} -
CVE Modified by [email protected]
Aug. 26, 2026
Action Type Old Value New Value Added Reference https://lists.apache.org/thread/9v114xlpgbzrrbzz5vf9f6r2q4wnxwwj Removed Reference https://lists.apache.org/thread/9v114xlpgbzrrbzz5vf9f6r2q4wnxwwj -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Aug. 26, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/08/26/4 -
New CVE Received by [email protected]
Aug. 25, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Apache Software Foundation', 'product': 'Apache Tomcat', 'versions': [{'status': 'affected', 'version': '11.0.0-M1', 'versionType': 'semver', 'lessThanOrEqual': '11.0.24'}, {'status': 'affected', 'version': '10.1.0-M1', 'versionType': 'semver', 'lessThanOrEqual': '10.1.57'}, {'status': 'affected', 'version': '9.0.0.M1', 'versionType': 'semver', 'lessThanOrEqual': '9.0.120'}, {'status': 'affected', 'version': '8.5.0', 'versionType': 'semver', 'lessThanOrEqual': '8.5.100'}, {'status': 'affected', 'version': '7.0.30', 'versionType': 'semver', 'lessThanOrEqual': '7.0.109'}], 'defaultStatus': 'unaffected'}] Added Description 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. Added CWE CWE-294 Added Reference https://lists.apache.org/thread/9v114xlpgbzrrbzz5vf9f6r2q4wnxwwj