CVE-2026-11850

MEDIUMPre-NVD 5.05.0—
EchelonGraph scoreHIGH confidence

Score 5.0 from GitHub Security Advisory published 2026-06-11. the CNA's CVSS baseline 5.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:redhat, epss, ghsa
Trending — 4 sources updated this week
5.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.0Exploit: NoneExposed: 0

A fix is available — apply it.

An integer underflow vulnerability was found in MIT krb5 in the berval2tl_data() function in plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c. The function performs an unsigned subtraction (bv_len - 2) without a prior bounds check. When bv_len is 0 or 1, the subtraction wraps to a large value which is then truncated to uint16_t, yielding 0xFFFE (65534) or 0xFFFF (65535). The subsequent malloc succeeds and memcpy reads up to 65534 bytes from a 0-1 byte buffer, resulting in a heap out-of-bounds read. The attack vector involves a malicious or compromised LDAP KDB backend returning a krbExtraData attribute with bv_len < 2, triggering the underflow when the KDC or kadmind reads principal data.

CVSS v3
5.0
EG Score
5.0(high)
EPSS
17.5%
KEV
Not listed

Published

June 11, 2026

Last Modified

July 6, 2026

Advisory Details (3)

Auto-updated Jun 16, 2026
Patch available. Sources: redhat.
redhat

2459970 – (CVE-2026-11850) CVE-2026-11850 krb5: krb5: integer underflow in berval2tl_data() leads to heap out-of-bounds read

https://bugzilla.redhat.com/show_bug.cgi?id=2459970
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-11850
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:25520

Vendor Advisories for CVE-2026-11850(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatkrb5-main-1.22.2-8.hum12026-06-12redhat

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 29× in last 7d / 111× 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 111 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-11850?
CVE-2026-11850 is a medium vulnerability published on June 11, 2026. An integer underflow vulnerability was found in MIT krb5 in the berval2tldata() function in plugins/kdb/ldap/libkdbldap/ldapprincipal2.c. The function performs an unsigned subtraction (bvlen - 2) without a prior bounds check. When bvlen is 0 or 1, the subtraction wraps to a large value which is…
When was CVE-2026-11850 disclosed?
CVE-2026-11850 was first published in the National Vulnerability Database on June 11, 2026, with the most recent update on July 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-11850 actively exploited?
CVE-2026-11850 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-11850?
CVE-2026-11850 has a CVSS v4.0 base score of 5.0 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-11850?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-11850, 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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