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.
CVE-2023-3326
“—” beside the score: it is equal to NVD's CVSS score.
Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2023-06-22. NVD baseline CVSS 9.8; sources differ by 0.0.
Also known asEUVD-2023-43994 (ENISA EUVD) · GHSA-vjhp-527w-c5vj (GitHub Security Advisories)Source: ENISA EUVD
- High severity, but no confirmed exploitation yet
No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.
The CVE record's CNA (FreeBSD) lists FreeBSD versions 13.2-RELEASE up to but not including 13.2-RELEASE-p1, 13.1-RELEASE up to but not including 13.1-RELEASE-p8 and 12.4-RELEASE up to but not including 12.4-RELEASE-p3 as affected. No release containing a fix is confirmed on record.
- CVSS v3
- 9.8
- EG Score
- 9.8CRITICALmedium confidence
- EG Risk
- 60EG Risk 60/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity98% × 45%Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation1.1% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high. - EPSS PROB
- 1.1%
- EPSS %ILE
- 65th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.
- EG Severity
- 9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 1.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.
No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
June 22, 2023
Last Modified
November 21, 2024
Advisory Details (3)
Auto-updated Oct 10, 2026Affected Packages
(4 across 4 ecosystems)
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| libpam-krb5 | 4.10-1, 4.11-1, 4.11-1.1, 4.11-2, 4.9-2 |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| libpam-krb5 | 4.11-1, 4.11-1.1, 4.11-2 |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| libpam-krb5 | 4.11-2 |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| libpam-krb5 | 4.11-2 |
| — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 20× in last 7d / 73× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 94 of 257 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 6 repeat rows among the latest 100 are merged into the row they repeat. The 163 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-02 16:40 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-11-02 02:00 UTCEG score recompute
- 2026-11-02 02:00 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-11-01 03:36 UTCEG score recompute
- 2026-11-01 03:36 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-31 16:30 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-31 05:12 UTCEG score recompute
- 2026-10-31 05:12 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-30 16:31 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-30 06:48 UTCEG score recompute
- 2026-10-30 06:48 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-29 16:30 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-29 08:25 UTCEG score recompute
- 2026-10-29 08:24 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-28 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-28 09:59 UTCEG score recompute
- 2026-10-28 09:58 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-27 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-27 10:42 UTCEG score recompute
- 2026-10-27 10:41 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-26 16:28 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-26 12:17 UTCEG score recompute
- 2026-10-26 12:17 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-25 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-25 13:48 UTCEG score recompute
Show 69 moreShow fewer
- 2026-10-25 13:48 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-24 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-24 15:22 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-23 16:59 UTCEG score recompute
- 2026-10-23 16:59 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-23 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-22 18:35 UTCEG score recompute
- 2026-10-22 18:35 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-22 16:31 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-21 20:05 UTCEG score recompute
- 2026-10-21 20:05 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-21 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-20 21:40 UTCEG score recompute
- 2026-10-20 21:40 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-20 16:30 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-19 23:11 UTCEG score recompute
- 2026-10-19 23:11 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-19 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-18 22:36 UTCEG score recompute
- 2026-10-18 22:36 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-18 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-18 08:00 UTCEG score recompute
- 2026-10-17 23:08 UTCEG score recompute
- 2026-10-17 23:08 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-17 16:30 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-17 00:41 UTCEG score recompute
- 2026-10-17 00:41 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-16 16:36 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-16 00:35 UTCEG score recompute
- 2026-10-16 00:35 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-15 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-14 19:11 UTCEG score recompute
- 2026-10-14 19:11 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-14 16:30 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-13 16:30 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-13 15:34 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-12 17:08 UTCEG score recompute
- 2026-10-12 17:08 UTCGHSA enrichmentGHSA-vjhp-527w-c5vj · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-12 16:31 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-11 21:52 UTCEG score recompute
- 2026-10-11 13:45 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-10 19:57 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-09 20:05 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-08 17:06 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-07 23:46 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-06 15:15 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-05 17:41 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-04 23:20 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-03 14:23 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-01 19:48 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-30 16:24 UTCEG score recompute
- 2026-09-30 15:01 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-29 15:17 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-28 13:49 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-27 13:42 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-26 15:56 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-26 00:22 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-24 14:01 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-23 13:46 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-23 08:53 UTCOSV refresh
- 2026-09-20 20:14 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-18 19:25 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-17 19:25 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-16 14:06 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-16 05:11 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-12 14:58 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-11 14:50 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-11 09:34 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-08 21:58 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
Related CVEs(same product + same CWE)
Same product
3 shownDebian:11:libpam-krb5
Frequently asked(5)
What is CVE-2023-3326?
When was CVE-2023-3326 made public?
Is CVE-2023-3326 actively exploited?
What is the CVSS score of CVE-2023-3326?
How do I remediate CVE-2023-3326?
Dependency Blast Radius
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