CVE-2026-55957

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM 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
7.3EG
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

A fix is available — apply it.

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(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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(3)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhattomcat11-main-11.0.23-0.1.hum12026-06-29redhat
redhattomcat10-main-10.1.56-1.hum12026-06-24redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(9 across 4 ecosystems)
Debian:13(3)
PackageVulnerable rangeFixed inDependents
tomcat1010.1.40-1, 10.1.46-1, 10.1.52-1~deb12u110.1.52-1~deb13u1—
tomcat1111.0.11-1, 11.0.6-111.0.15-1~deb13u1—
tomcat9—9.0.70-2—
Debian:14(3)
PackageVulnerable rangeFixed inDependents
tomcat10—10.1.40-1—
tomcat11—11.0.5-1—
tomcat9—9.0.70-2—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
tomcat1010.1.10-1 ... 10.1.9-1 (28 versions)10.1.52-1~deb12u1—
tomcat9—9.0.70-2—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
tomcat99.0.43-1 ... 9.0.70-1 (28 versions)9.0.70-2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 38× in last 7d / 116× 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.

Showing the most recent 100 of 184 total refreshes for this CVE.

  1. 2026-08-21 07:22 UTCEG score recompute
  2. 2026-08-21 07:22 UTCVendor advisory
  3. 2026-08-21 07:22 UTCGHSA enrichment
  4. 2026-08-20 22:55 UTCEPSS rescore
  5. 2026-08-20 18:31 UTCVendor advisory
  6. 2026-08-20 18:31 UTCGHSA enrichment
  7. 2026-08-20 05:40 UTCEG score recompute
  8. 2026-08-20 05:40 UTCVendor advisory
  9. 2026-08-20 05:40 UTCGHSA enrichment
  10. 2026-08-19 17:04 UTCEPSS rescore
  11. 2026-08-19 12:35 UTCVendor advisory
  12. 2026-08-19 12:35 UTCGHSA enrichment
  13. 2026-08-18 23:09 UTCEG score recompute
  14. 2026-08-18 23:09 UTCVendor advisory
  15. 2026-08-18 23:09 UTCGHSA enrichment
  16. 2026-08-18 13:48 UTCEPSS rescore
  17. 2026-08-18 06:27 UTCEG score recompute
  18. 2026-08-18 06:27 UTCVendor advisory
  19. 2026-08-18 06:27 UTCGHSA enrichment
  20. 2026-08-17 13:47 UTCEPSS rescore
  21. 2026-08-17 12:27 UTCVendor advisory
  22. 2026-08-17 12:27 UTCGHSA enrichment
  23. 2026-08-16 23:20 UTCEG score recompute
  24. 2026-08-16 23:20 UTCVendor advisory
  25. 2026-08-16 23:20 UTCGHSA enrichment
Show 75 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 10:29 UTCEG score recompute
  3. 2026-08-16 10:29 UTCVendor advisory
  4. 2026-08-16 10:29 UTCGHSA enrichment
  5. 2026-08-16 02:14 UTCEPSS rescore
  6. 2026-08-15 21:39 UTCVendor advisory
  7. 2026-08-15 21:39 UTCGHSA enrichment
  8. 2026-08-15 08:47 UTCEG score recompute
  9. 2026-08-15 08:47 UTCVendor advisory
  10. 2026-08-15 08:47 UTCGHSA enrichment
  11. 2026-08-15 01:30 UTCEPSS rescore
  12. 2026-08-14 19:56 UTCVendor advisory
  13. 2026-08-14 19:56 UTCGHSA enrichment
  14. 2026-08-14 07:06 UTCEG score recompute
  15. 2026-08-14 07:06 UTCVendor advisory
  16. 2026-08-14 07:06 UTCGHSA enrichment
  17. 2026-08-13 22:00 UTCEPSS rescore
  18. 2026-08-13 18:15 UTCVendor advisory
  19. 2026-08-13 18:15 UTCGHSA enrichment
  20. 2026-08-13 04:46 UTCGHSA enrichment
  21. 2026-08-12 15:56 UTCEG score recompute
  22. 2026-08-12 15:56 UTCGHSA enrichment
  23. 2026-08-12 13:51 UTCEPSS rescore
  24. 2026-08-12 03:05 UTCGHSA enrichment
  25. 2026-08-11 14:13 UTCEG score recompute
  26. 2026-08-11 14:13 UTCGHSA enrichment
  27. 2026-08-11 01:22 UTCEG score recompute
  28. 2026-08-11 01:22 UTCGHSA enrichment
  29. 2026-08-11 00:00 UTCEPSS rescore
  30. 2026-08-10 12:31 UTCGHSA enrichment
  31. 2026-08-09 23:29 UTCGHSA enrichment
  32. 2026-08-09 10:39 UTCGHSA enrichment
  33. 2026-08-08 21:46 UTCEG score recompute
  34. 2026-08-08 21:46 UTCGHSA enrichment
  35. 2026-08-08 16:37 UTCEPSS rescore
  36. 2026-08-08 08:55 UTCGHSA enrichment
  37. 2026-08-07 20:05 UTCEG score recompute
  38. 2026-08-07 20:05 UTCGHSA enrichment
  39. 2026-08-07 07:14 UTCGHSA enrichment
  40. 2026-08-06 18:24 UTCEG score recompute
  41. 2026-08-06 18:24 UTCGHSA enrichment
  42. 2026-08-06 13:47 UTCEPSS rescore
  43. 2026-08-06 05:33 UTCEG score recompute
  44. 2026-08-06 05:33 UTCGHSA enrichment
  45. 2026-08-05 19:17 UTCEPSS rescore
  46. 2026-08-05 16:42 UTCGHSA enrichment
  47. 2026-08-05 03:35 UTCEG score recompute
  48. 2026-08-05 03:35 UTCGHSA enrichment
  49. 2026-08-04 15:10 UTCEPSS rescore
  50. 2026-08-04 14:44 UTCEG score recompute
  51. 2026-08-04 14:44 UTCGHSA enrichment
  52. 2026-08-04 10:39 UTCEPSS rescore
  53. 2026-08-03 20:36 UTCEG score recompute
  54. 2026-08-03 20:36 UTCGHSA enrichment
  55. 2026-08-03 10:36 UTCEPSS rescore
  56. 2026-08-03 07:45 UTCGHSA enrichment
  57. 2026-08-02 16:40 UTCGHSA enrichment
  58. 2026-08-02 03:50 UTCEG score recompute
  59. 2026-08-02 03:49 UTCGHSA enrichment
  60. 2026-08-02 02:27 UTCEPSS rescore
  61. 2026-08-01 14:57 UTCEG score recompute
  62. 2026-08-01 14:57 UTCGHSA enrichment
  63. 2026-08-01 04:16 UTCEPSS rescore
  64. 2026-08-01 02:06 UTCGHSA enrichment
  65. 2026-07-31 13:09 UTCGHSA enrichment
  66. 2026-07-31 00:18 UTCEG score recompute
  67. 2026-07-31 00:18 UTCGHSA enrichment
  68. 2026-07-30 16:28 UTCEPSS rescore
  69. 2026-07-30 11:25 UTCEG score recompute
  70. 2026-07-30 11:25 UTCGHSA enrichment
  71. 2026-07-30 01:30 UTCEPSS rescore
  72. 2026-07-30 01:30 UTCEPSS rescore
  73. 2026-07-29 22:34 UTCEG score recompute
  74. 2026-07-29 22:34 UTCGHSA enrichment
  75. 2026-07-29 08:45 UTCGHSA enrichment

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 14.3% 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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