CVE-2026-55957

HIGHPre-NVD 7.37.3—
EchelonGraph scoreHIGH confidence

Score 7.3 from GitHub Security Advisory (severity: HIGH) published 2026-06-29. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
7.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36, from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.

Users are recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue.

CVSS v3
7.3
EG Score
7.3(high)
EPSS
36.8%
KEV
Not listed

Published

June 29, 2026

Last Modified

July 2, 2026

Advisory Details (2)

Auto-updated Jun 30, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-55957: Apache Tomcat: Authentication bypass with JNDIRealm and GSSAPI authenticated bind

http://www.openwall.com/lists/oss-security/2026/06/29/26
generic
https://lists.apache.org/thread/7fk339o5jvd4mcgsf0chbrn4o525ccjh

Vendor Advisories for CVE-2026-55957(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 29× in last 7d / 34× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-07 01:35 UTCEG score recompute
  2. 2026-07-07 01:35 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 12:43 UTCEG score recompute
  6. 2026-07-06 12:43 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 23:51 UTCEG score recompute
  10. 2026-07-05 23:51 UTCGHSA enrichment
  11. 2026-07-05 11:00 UTCEG score recompute
  12. 2026-07-05 11:00 UTCGHSA enrichment
  13. 2026-07-05 02:31 UTCEPSS rescore
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-04 22:09 UTCEG score recompute
  16. 2026-07-04 22:09 UTCGHSA enrichment
  17. 2026-07-04 09:18 UTCEG score recompute
  18. 2026-07-04 09:18 UTCGHSA enrichment
  19. 2026-07-04 06:31 UTCEPSS rescore
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-03 20:26 UTCEG score recompute
  22. 2026-07-03 20:26 UTCGHSA enrichment
  23. 2026-07-03 07:35 UTCEG score recompute
  24. 2026-07-03 07:35 UTCGHSA enrichment
  25. 2026-07-02 18:44 UTCEG score recompute▲ 7.30
Show 9 more
  1. 2026-07-02 18:44 UTCGHSA enrichment
  2. 2026-07-01 15:07 UTCEPSS rescore
  3. 2026-06-30 23:22 UTCEPSS rescore
  4. 2026-06-30 14:32 UTCNVD updateCVSS v3 → 7.3 · severity → HIGH
  5. 2026-06-30 00:21 UTCNVD update
  6. 2026-06-29 22:49 UTCMITRE cvelistV5
  7. 2026-06-29 21:26 UTCNVD update
  8. 2026-06-29 20:57 UTCEG score recompute
  9. 2026-06-29 20:57 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-55957?
CVE-2026-55957 is a high vulnerability published on June 29, 2026. Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1…
When was CVE-2026-55957 disclosed?
CVE-2026-55957 was first published in the National Vulnerability Database on June 29, 2026, with the most recent update on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55957 actively exploited?
CVE-2026-55957 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 36.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-55957?
CVE-2026-55957 has a CVSS v3.1 base score of 7.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-55957?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55957, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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