CVE-2026-107708
Medium · 4.9CVSS
4.9
EPSS
0.5%
Published
Oct 8, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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