9.1

CVE-2026-101296: Apache Tomcat: JNDIRealm bind credential validation fails open for non-GSSAPI SASL mechanisms

Awaiting analysis
AliasesDEBIAN-CVE-2026-101296UBUNTU-CVE-2026-101296
Published 20-10-2026Last modified 21-10-2026

Vulnerability summary

CVE-2026-101296 is a critical (CVSS 9.1) Missing Critical Step in Authentication vulnerability in apache software foundation apache tomcat. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 50.1% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.1 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.1/10
010
Critical · v4.0 (CVE.org)
EPSS score
0.63%
0%100%
Low · Change unavailable
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 4
MGASA-2026-0568OPENSUSE-SU-2026:12254-1OPENSUSE-SU-2026:12255-1OPENSUSE-SU-2026:12256-1SUSE-SU-2026:4927-1

Timeline

  1. 20-10-2026
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

A missing critical step in authentication vulnerability in Apache Tomcat when the JNDI realm was configured with with a non GSSAPI SASL authentication mechanism allowed attackers to authenticate without providing the correct password. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.26, from 10.1.0-M1 through 10.1.60, from 9.0.0.M1 through 9.0.122. 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 11.0.27, 10.1.61 or 9.0.123, which fix the issue.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.63%

Chance of exploitation in the next 30 days

Percentile

50%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

21-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu6 products
  • tomcat10All versions (No fix recorded)
  • tomcat11All versions (No fix recorded)
  • tomcat6All versions (No fix recorded)
  • tomcat7All versions (No fix recorded)
  • tomcat8All versions (No fix recorded)
Debian3 products
  • tomcat10All versions (No fix recorded)
  • tomcat11All versions (No fix recorded)
  • tomcat9< 9.0.70-2
Apache software foundation1 product
  • apache tomcat≥ 11.0.0-M1, ≤ 11.0.26 | ≥ 10.1.0-M1, ≤ 10.1.60 | ≥ 9.0.0.M1, ≤ 9.0.122 | ≥ 8.5.0, ≤ 8.5.100 | ≥ 7.0.0, ≤ 7.0.109

3 vendors · 10 products

References

8 links