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 — 3 sources updated this week
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS: 7.3Exploit: None knownExposed: 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)
EG Risk
39(Track)
EG Risk 39/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity73% × 45%
Exploitation3% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
3%
EPSS %ILE
86%
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 12× in last 7d / 78× 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. 2026-07-27 02:52 UTCEG score recompute
  2. 2026-07-27 02:51 UTCGHSA enrichment
  3. 2026-07-26 14:54 UTCEPSS rescore
  4. 2026-07-26 13:57 UTCEG score recompute
  5. 2026-07-26 13:57 UTCGHSA enrichment
  6. 2026-07-25 14:18 UTCEPSS rescore
  7. 2026-07-24 14:18 UTCEPSS rescore
  8. 2026-07-23 14:18 UTCEPSS rescore
  9. 2026-07-23 03:20 UTCEG score recompute
  10. 2026-07-22 14:08 UTCEPSS rescore
  11. 2026-07-21 15:25 UTCEPSS rescore
  12. 2026-07-20 17:08 UTCEPSS rescore
  13. 2026-07-19 14:31 UTCEPSS rescore
  14. 2026-07-19 14:31 UTCEPSS rescore
  15. 2026-07-19 02:29 UTCEPSS rescore
  16. 2026-07-18 10:04 UTCEPSS rescore
  17. 2026-07-17 06:26 UTCGHSA enrichment
  18. 2026-07-16 17:35 UTCGHSA enrichment
  19. 2026-07-16 17:03 UTCEPSS rescore
  20. 2026-07-16 04:31 UTCGHSA enrichment
  21. 2026-07-15 16:57 UTCEPSS rescore
  22. 2026-07-15 16:57 UTCEPSS rescore
  23. 2026-07-15 15:40 UTCGHSA enrichment
  24. 2026-07-15 02:49 UTCGHSA enrichment
  25. 2026-07-15 02:00 UTCEPSS rescore
Show 53 more
  1. 2026-07-15 02:00 UTCEPSS rescore
  2. 2026-07-14 13:59 UTCGHSA enrichment
  3. 2026-07-14 01:08 UTCGHSA enrichment
  4. 2026-07-13 22:31 UTCEPSS rescore
  5. 2026-07-13 12:17 UTCGHSA enrichment
  6. 2026-07-13 06:13 UTCEPSS rescore
  7. 2026-07-13 06:13 UTCEPSS rescore
  8. 2026-07-12 23:21 UTCGHSA enrichment
  9. 2026-07-12 10:30 UTCGHSA enrichment
  10. 2026-07-12 05:46 UTCEPSS rescore
  11. 2026-07-11 21:39 UTCGHSA enrichment
  12. 2026-07-11 08:48 UTCGHSA enrichment
  13. 2026-07-11 08:27 UTCEPSS rescore
  14. 2026-07-11 08:27 UTCEPSS rescore
  15. 2026-07-10 19:57 UTCGHSA enrichment
  16. 2026-07-10 07:06 UTCGHSA enrichment
  17. 2026-07-09 19:10 UTCEPSS rescore
  18. 2026-07-09 19:10 UTCEPSS rescore
  19. 2026-07-09 18:12 UTCGHSA enrichment
  20. 2026-07-09 05:21 UTCGHSA enrichment
  21. 2026-07-08 16:30 UTCGHSA enrichment
  22. 2026-07-08 15:16 UTCEPSS rescore
  23. 2026-07-08 15:16 UTCEPSS rescore
  24. 2026-07-08 03:39 UTCGHSA enrichment
  25. 2026-07-07 14:48 UTCGHSA enrichment
  26. 2026-07-07 13:46 UTCEPSS rescore
  27. 2026-07-07 13:46 UTCEPSS rescore
  28. 2026-07-07 01:35 UTCGHSA enrichment
  29. 2026-07-06 16:27 UTCEPSS rescore
  30. 2026-07-06 16:27 UTCEPSS rescore
  31. 2026-07-06 12:43 UTCGHSA enrichment
  32. 2026-07-06 02:23 UTCEPSS rescore
  33. 2026-07-06 02:23 UTCEPSS rescore
  34. 2026-07-05 23:51 UTCGHSA enrichment
  35. 2026-07-05 11:00 UTCGHSA enrichment
  36. 2026-07-05 02:31 UTCEPSS rescore
  37. 2026-07-05 02:30 UTCEPSS rescore
  38. 2026-07-04 22:09 UTCGHSA enrichment
  39. 2026-07-04 09:18 UTCGHSA enrichment
  40. 2026-07-04 06:31 UTCEPSS rescore
  41. 2026-07-04 06:31 UTCEPSS rescore
  42. 2026-07-03 20:26 UTCGHSA enrichment
  43. 2026-07-03 07:35 UTCGHSA enrichment
  44. 2026-07-02 18:44 UTCEG score recompute▲ 7.30
  45. 2026-07-02 18:44 UTCGHSA enrichment
  46. 2026-07-01 15:07 UTCEPSS rescore
  47. 2026-06-30 23:22 UTCEPSS rescore
  48. 2026-06-30 14:32 UTCNVD updateCVSS v3 → 7.3 · severity → HIGH
  49. 2026-06-30 00:21 UTCNVD update
  50. 2026-06-29 22:49 UTCMITRE cvelistV5
  51. 2026-06-29 21:26 UTCNVD update
  52. 2026-06-29 20:57 UTCEG score recompute
  53. 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 3% probability of exploitation in the next 30 days, which ranks it in the top 14.2% of all scored CVEs.
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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