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CVE-2026-65905Suited to automated attack · CISA

Apache Tomcat: Limited replay attack possible with DIGEST authentication

CVSS score

9.8

EPSS probability

%0.6

Risk score

0.1

Published

1 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Official patch verified

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-65905 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-65905 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1Apache Software FoundationApache Tomcat View
2apachetomcat View
3apachetomcat View
4apachetomcat View
5apachetomcat View
6mavenorg.apache.tomcat:tomcat View
7mavenorg.apache.tomcat:tomcat View
8mavenorg.apache.tomcat:tomcat View
9mavenorg.apache.tomcat:tomcat View
10mavenorg.apache.tomcat:tomcat View
11mavenorg.apache.tomcat.embed:tomcat-embed-core View
12mavenorg.apache.tomcat.embed:tomcat-embed-core View
13mavenorg.apache.tomcat.embed:tomcat-embed-core View
14mavenorg.apache.tomcat.embed:tomcat-embed-core View
15mavenorg.apache.tomcat.embed:tomcat-embed-core View
16mavenorg.apache.tomcat:tomcat-catalina View
17mavenorg.apache.tomcat:tomcat-catalina View
18mavenorg.apache.tomcat:tomcat-catalina View
19mavenorg.apache.tomcat:tomcat-catalina View
20mavenorg.apache.tomcat:tomcat-catalina View
21mavenorg.apache.tomcat:tomcat View
22mavenorg.apache.tomcat:tomcat View
23mavenorg.apache.tomcat:tomcat View
24mavenorg.apache.tomcat:tomcat View
25mavenorg.apache.tomcat.embed:tomcat-embed-core View
26mavenorg.apache.tomcat.embed:tomcat-embed-core View
27mavenorg.apache.tomcat.embed:tomcat-embed-core View
28mavenorg.apache.tomcat.embed:tomcat-embed-core View
29mavenorg.apache.tomcat:tomcat-catalina View
30mavenorg.apache.tomcat:tomcat-catalina View
31mavenorg.apache.tomcat:tomcat-catalina View
32mavenorg.apache.tomcat:tomcat-catalina View
Total affected vendors: 3|Products: 32

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
9.8CVSS V3_1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE ADP
9.8CVSS V31CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD
9.8CVSS 3.x—Vector not publishedGitHub Advisory
0.0CVSS 4.0—Vector not publishedGitHub Advisory

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

9 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

osvorg.apache.tomcat:tomcat11.0.25

OSV düzeltilmiş sürüm: 11.0.25

osvorg.apache.tomcat:tomcat10.1.58

OSV düzeltilmiş sürüm: 10.1.58

osvorg.apache.tomcat:tomcat9.0.121

OSV düzeltilmiş sürüm: 9.0.121

osvorg.apache.tomcat.embed:tomcat-embed-core11.0.25

OSV düzeltilmiş sürüm: 11.0.25

osvorg.apache.tomcat.embed:tomcat-embed-core10.1.58

OSV düzeltilmiş sürüm: 10.1.58

osvorg.apache.tomcat.embed:tomcat-embed-core9.0.121

OSV düzeltilmiş sürüm: 9.0.121

osvorg.apache.tomcat:tomcat-catalina11.0.25

OSV düzeltilmiş sürüm: 11.0.25

osvorg.apache.tomcat:tomcat-catalina10.1.58

OSV düzeltilmiş sürüm: 10.1.58

osvorg.apache.tomcat:tomcat-catalina9.0.121

OSV düzeltilmiş sürüm: 9.0.121

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-65905 is associated with the following CWEs:

CWE-294: Common Weakness Enumeration Entry CWE-294

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.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

https://lists.apache.org/thread/9v114xlpgbzrrbzz5vf9f6r2q4wnxwwjvendor-advisoryhttp://www.openwall.com/lists/oss-security/2026/08/26/4nvdhttps://nvd.nist.gov/vuln/detail/CVE-2026-65905vendor-advisoryhttps://github.com/advisories/GHSA-9xv2-5v5q-p794vendor-advisoryhttps://github.com/apache/tomcatvendor-advisory

CVSS Vector Radar Chart

9.8 / 10
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama doğrulandı

9 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

AS
Apache Software Foundation logo
Apache Software Foundation
A
apache logo
apache
M
maven logo
maven

Weakness Type (CWE & CAPEC)

CWE-294

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