Detections
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Echo: krb5: security update to 1.21.3-5+e9

medium Tenable Self-Hosted Container Security Plugin ID 474347

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - MIT krb5 through 1.22.2 contains a NULL pointer dereference vulnerability in the KDC's
 get_pac_princ_with_realm() that returns success while leaving the client principal NULL on malformed
 names. A malicious or compromised cross-realm trusted KDC can send an S4U2Proxy request with a PAC
 carrying a malformed client name to crash krb5kdc and deny authentication. (CVE-2026-107708)

Solution

Update the krb5 library and its related packages to version 1.21.3-5+e9 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-107708

Plugin Details

Severity: Medium

ID: 474347

Version: Revision 1.1

Type: Local

Published: 10/11/2026

Updated: 10/11/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.67

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

Vector: CVSS2#AV:N/AC:L/Au:M/C:N/I:N/A:C

CVSS Score Source: CVE-2026-107708

CVSS v3

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 4.3

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 4.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/9/2026

Vulnerability Publication Date: 10/8/2026

Reference Information

CVE: CVE-2026-107708