CVE-2026-43512

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 1.2%, top 35% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported versions any also be affect

Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
65.4%
KEV
Not listed

Published

May 12, 2026

Last Modified

May 15, 2026

Advisory Details (2)

Auto-updated Jun 21, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-43512: Apache Tomcat: Digest authenticator will authenticate any unknown user

http://www.openwall.com/lists/oss-security/2026/05/12/8
generic
https://lists.apache.org/thread/7x09x7o12solvclslw3sz0288xc8wx73

Vendor Advisories for CVE-2026-43512(4)

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

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntutomcat7-user (7.0.68-1ubuntu0.4+esm4) @ xenial2026-06-28ubuntu
ubuntutomcat9-user (9.0.58-1ubuntu0.2+esm4) @ jammy2026-06-28ubuntu
redhatdevspaces/server-rhel9:17806949942026-06-10redhat
redhattomcat10-main-10.1.55-1.hum12026-05-12redhat
redhattomcat11-main-11.0.22-0.1.hum12026-05-05redhat

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

(3 across 1 ecosystem)
Maven(3)
PackageVulnerable rangeFixed inDependents
org.apache.tomcat.embed:tomcat-embed-core11.0.0 ... 11.0.9 (42 versions)11.0.22—
org.apache.tomcat:tomcat11.0.0 ... 11.0.9 (42 versions)11.0.22—
org.apache.tomcat:tomcat-catalina11.0.0 ... 11.0.9 (42 versions)11.0.22—

Weakness Classification(1)

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

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 138× 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 241 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-43512?
CVE-2026-43512 is a critical vulnerability published on May 12, 2026. DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported…
When was CVE-2026-43512 disclosed?
CVE-2026-43512 was first published in the National Vulnerability Database on May 12, 2026, with the most recent update on May 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43512 actively exploited?
CVE-2026-43512 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 65.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-43512?
CVE-2026-43512 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-43512?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43512, 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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