CVE-2023-3326

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2023-06-22. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.1%CVSS: 9.8Exploit: None knownExposed services: Not assessed

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

pam_krb5 authenticates a user by essentially running kinit with the password, getting a ticket-granting ticket (tgt) from the Kerberos KDC (Key Distribution Center) over the network, as a way to verify the password. However, if a keytab is not provisioned on the system, pam_krb5 has no way to validate the response from the KDC, and essentially trusts the tgt provided over the network as being valid. In a non-default FreeBSD installation that leverages pam_krb5 for authentication and does not have a keytab provisioned, an attacker that is able to control both the password and the KDC responses can return a valid tgt, allowing authentication to occur for any user on the system.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
60
EG Risk 60/100CISA SSVC

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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
1.1%
EPSS %ILE
64th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

June 22, 2023

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Oct 2, 2026
No fix on record yet.
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20230714-0005/
generic
https://security.FreeBSD.org/advisories/FreeBSD-SA-23:09.pam_krb5.asc
generic
https://security.FreeBSD.org/advisories/FreeBSD-SA-23:04.pam_krb5.asc

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
libpam-krb54.10-1, 4.11-1, 4.11-1.1, 4.11-2, 4.9-2
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libpam-krb54.11-1, 4.11-1.1, 4.11-2
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libpam-krb54.11-2
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libpam-krb54.11-2
  • every version on: no fix on record
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 32× 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 196 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2023-3326?
CVE-2023-3326 is a critical vulnerability published on June 22, 2023. pamkrb5 authenticates a user by essentially running kinit with the password, getting a ticket-granting ticket (tgt) from the Kerberos KDC (Key Distribution Center) over the network, as a way to verify the password. However, if a keytab is not provisioned on the system, pamkrb5 has no way to…
When was CVE-2023-3326 disclosed?
CVE-2023-3326 was first published on June 22, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-3326 actively exploited?
CVE-2023-3326 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.1% probability of exploitation in the next 30 days (64th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-3326?
CVE-2023-3326 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-3326?
No fix for CVE-2023-3326 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix.

Dependency Blast Radius

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