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 a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

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
9.8(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
63%
KEV
Not listed

Published

June 22, 2023

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Aug 21, 2026
No patch confirmed 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 rangeFixed inDependents
libpam-krb54.10-1, 4.11-1, 4.11-1.1, 4.11-2, 4.9-2——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libpam-krb54.11-1, 4.11-1.1, 4.11-2——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libpam-krb54.11-2——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libpam-krb54.11-2——

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 36× 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 148 total refreshes for this CVE.

  1. 2026-08-25 13:46 UTCEPSS rescore
  2. 2026-08-23 00:17 UTCEPSS rescore
  3. 2026-08-21 23:47 UTCEPSS rescore
  4. 2026-08-20 22:53 UTCEPSS rescore
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  8. 2026-08-17 14:59 UTCOSV refresh
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  1. 2026-08-02 09:29 UTCOSV refresh
  2. 2026-08-02 02:25 UTCEPSS rescore
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  4. 2026-08-01 04:14 UTCEPSS rescore
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  17. 2026-07-23 02:23 UTCEG score recompute
  18. 2026-07-22 23:10 UTCEG score recompute
  19. 2026-07-22 14:06 UTCEPSS rescore
  20. 2026-07-21 15:23 UTCEPSS rescore
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  22. 2026-07-20 17:06 UTCEPSS rescore
  23. 2026-07-19 14:29 UTCEPSS rescore
  24. 2026-07-19 02:27 UTCEPSS rescore
  25. 2026-07-18 10:03 UTCEPSS rescore
  26. 2026-07-18 10:03 UTCEPSS rescore
  27. 2026-07-16 17:01 UTCEPSS rescore
  28. 2026-07-16 17:01 UTCEPSS rescore
  29. 2026-07-15 17:19 UTCOSV refresh
  30. 2026-07-15 16:56 UTCEPSS rescore
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  32. 2026-07-15 01:58 UTCEPSS rescore
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  37. 2026-07-11 08:26 UTCEPSS rescore
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  39. 2026-07-09 19:08 UTCEPSS rescore
  40. 2026-07-08 15:13 UTCEPSS rescore
  41. 2026-07-07 13:44 UTCEPSS rescore
  42. 2026-07-06 16:26 UTCEPSS rescore
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  44. 2026-07-06 02:22 UTCEPSS rescore
  45. 2026-07-05 02:29 UTCEPSS rescore
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  47. 2026-07-01 15:05 UTCEPSS rescore
  48. 2026-06-30 23:21 UTCEPSS rescore
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  50. 2026-06-29 14:05 UTCEPSS rescore
  51. 2026-06-28 14:06 UTCEPSS rescore
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  53. 2026-06-28 04:55 UTCEPSS rescore
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  55. 2026-06-27 17:34 UTCOSV refresh
  56. 2026-06-27 03:07 UTCEPSS rescore
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  58. 2026-06-25 13:48 UTCEPSS rescore
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  68. 2026-06-21 01:58 UTCEPSS rescore
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  70. 2026-06-19 19:24 UTCEPSS rescore
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  72. 2026-06-18 17:51 UTCEPSS rescore
  73. 2026-06-17 17:51 UTCEPSS rescore
  74. 2026-06-17 17:51 UTCEPSS rescore
  75. 2026-06-16 17:51 UTCEPSS rescore

Related CVEs(same CWE)

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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 36.9% of all 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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-3326, 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.

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