# github.com/free5gc/ausf (Go) vulnerabilities

4 known vulnerabilities (2 high, 1 medium, 1 low), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: v1.4.6 (Sep 4, 2026): affected by CVE-2026-55784
- Newest unaffected release: Every release is affected by at least one advisory
- Releases: 18 since v1.0.0 (Jan 30, 2021)
- Registry: https://pkg.go.dev/github.com/free5gc/ausf
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-55785: v1.0.0 to v1.4.4 (v1.4.5 is outside it)
- CVE-2026-55784: v1.0.0 to v1.4.6 (through the newest release)
- CVE-2026-53551: v1.0.0 to v1.4.4 (v1.4.5 is outside it)
- CVE-2026-33063: v1.0.0 to v1.4.1 (v1.4.2 is outside it)

## Advisories (4)

### [CVE-2026-55785](https://cve.now/CVE-2026-55785): free5GC AUSF uses non-constant-time authentication comparisons and logs XRES in 5G-AKA

- Severity: Low 3.7
- Published: Aug 28, 2026
- Affected: fixed in 1.4.5.
- Fixed in v1.4.5 (released Jun 22, 2026, 67 days before disclosure).
- The latest release, v1.4.6, is not affected.

### [CVE-2026-55784](https://cve.now/CVE-2026-55784): free5GC AUSF authentication contexts can be overwritten by concurrent requests for the same SUPI

- Severity: High 7.5
- Published: Aug 28, 2026
- Affected: all versions; through 1.4.4.
- No fix released. The latest release, v1.4.6, is still affected.

### [CVE-2026-53551](https://cve.now/CVE-2026-53551): free5GC AUSF: null byte injection in supiOrSuci causes HTTP 500 internal service failure

- Severity: Medium 6.9
- Published: Jul 31, 2026
- Affected: fixed in 1.4.5.
- Fixed in v1.4.5 (released Jun 22, 2026, 39 days before disclosure).
- The latest release, v1.4.6, is not affected.

### [CVE-2026-33063](https://cve.now/CVE-2026-33063): free5GC AUSF UE Authentication Panic on Nil SuciSupiMap Interface Conversion

- Severity: High 8.7
- Published: Mar 20, 2026
- Affected: fixed in 1.4.2.
- Fixed in v1.4.2 (released Feb 6, 2026, 42 days before disclosure).
- The latest release, v1.4.6, is not affected.

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