Vulnerability · CVE-2026-101296

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 t

Published Oct 20, 2026 · catalog updated Oct 21, 2026 · Apache

Last checked Oct 31, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-101296. EPSS is 0.63%. Act only if a listed version of Apache is installed.

Gaps on this record

No version range is stored. A customer cannot check an installed version against this record.
No vendor fix or required action is stored. Compare the linked advisory before you change production.

Severity: Critical9.1
Known exploitation: Not in CISA/VulnCheck KEV
EPSS: 0.63%
Remediation: Advisory link
Affected products: vendor Apache Software Foundation

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

vendor Apache Software Foundationversion unspecified

How to fix CVE-2026-101296

No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
No version range is stored, so an installed version cannot be checked on this page.
Advisory
Open the apache record and follow its fix.
Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-101296. EPSS is 0.63%. Act only if a listed version of Apache is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-304. EPSS 0.63%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Apache Tomcat security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

Oct 20, 2026 · NIST NVD
Detected
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 t
Oct 20, 2026 · NIST NVD
Updated
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 t
Oct 20, 2026 · NIST NVD
Updated
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 t
Oct 21, 2026 · NIST NVD
Updated
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 t
Oct 21, 2026 · EUVD
Updated
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 t

Sources

Apache Software FoundationVendor advisoryCVE-2026-101296
CVE-2026-101296 is named on the public Apache Software Foundation page.
tomcat.apache.org
CVE.orgVulnerability recordCVE-2026-101296
Official CVE identifier
cve.org
FIRST EPSSExploitation probabilityCVE-2026-101296
30-day exploitation probability 0.63%
first.org
EUVDVulnerability recordEUVD-2026-105010
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
euvd.enisa.europa.eu
NIST NVDVulnerability recordCVE-2026-101296
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.
nvd.nist.gov
Openwall OSS SecurityThreat researchCVE-2026-101296
Research mention from Openwall OSS Security. Not confirmation of exploitation.
openwall.com

References

Freshness

Last verified in this catalog Oct 31, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

FIRST EPSSOct 31, 2026
Apache Software FoundationOct 23, 2026
Openwall OSS SecurityOct 23, 2026
CVE.orgOct 21, 2026
EUVDOct 21, 2026
NIST NVDOct 21, 2026

Priority score

30/100

Evidence confidence: High

A vendor or government advisory agrees with at least one other source.

Confirmed exploitation0/30
EPSS probability1/20
CVSS severity14/15
Public exploit0/10
Internet exposure10/10
Product prevalence0/5
Detection0/5
Threat research5/5

Decision signals

Four separate signals — do not infer one from another.

Critical

CVSS severity
9.1 v4.0
Technical impact. Separate from exploitation likelihood.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS probability
0.63% · p49.77%
Estimated probability of exploitation within 30 days (FIRST).
Known exploitation
No verified KEV listing
Evidence from CISA KEV or VulnCheck KEV only — not from EPSS alone.
Patch availability
Advisory link
A patch or advisory reference is linked. Open the original publisher for availability by product version.

Stacks

Apache Tomcat

Weakness

CWE-304 MITRE definition

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