# CVE-2026-108102: Open5GS heap out-of-bounds read in PFCP parsing

Source: https://junglewise.ai/threats/cve-2026-108102-open5gs-through-2-8-0-contains-a-heap-out-of-bounds-read  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-09. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-108102 · Severity: medium · CVSS 5.3 · Published 2026-10-09

Open5GS is an open-source implementation of 5G core network infrastructure. A remote attacker can send a malformed PFCP message to crash the SMF (Session Management Function) component or read sensitive memory contents, disrupting 5G network services or potentially exposing confidential data.

Technologies: [Open5GS](https://junglewise.ai/threats/technologies/open5gs). Vendors: [Open5GS](https://junglewise.ai/threats/vendors/open5gs).

## Quick answers

**Is CVE-2026-108102 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-108102 being exploited in the wild.

**How severe is CVE-2026-108102?** Medium severity, with a CVSS score of 5.3, published 9 October 2026.

**Which products and versions are affected?** Open5GS through 2.8.0.

**Is there a fix for CVE-2026-108102?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-108102 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-108102?** Check whether you run Open5GS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The ogs_pfcp_parse_volume_measurement() function in lib/pfcp/types.c fails to validate the length of Volume Measurement Information Elements, allowing an attacker to read up to 48 bytes past the allocated buffer. An unauthenticated remote attacker can send a crafted PFCP Session Report Request to UDP port 8805, triggering the heap out-of-bounds read and potentially causing denial of service or information disclosure.

## Affected products

- Open5GS Open5GS through 2.8.0

## Timeline

- 2026-10-09: disclosed

## References

- [https://github.com/open5gs/open5gs](https://github.com/open5gs/open5gs)
- [https://github.com/open5gs/open5gs/blob/v2.8.0/lib/pfcp/types.c](https://github.com/open5gs/open5gs/blob/v2.8.0/lib/pfcp/types.c)

## Related threats

- [Open5GS HTTP/2 SBI server memory exhaustion](https://junglewise.ai/threats/cve-2026-106806-a-memory-exhaustion-issue-exists-in-open5gs-v2-8-0-in-the-http-2)
- [open5GS PFCP transaction handling denial of service](https://junglewise.ai/threats/cve-2026-106807-a-denial-of-service-vulnerability-exists-in-open5gs-v2-8-0-in)
- [Open5GS heap out-of-bounds write in multipart parsing](https://junglewise.ai/threats/cve-2026-116543-open5gs-1-3-0-through-2-8-0-contains-a-heap-out-of-bounds-write)
- [Open5GS assertion failure in SGSN context request handling](https://junglewise.ai/threats/cve-2026-108105-open5gs-through-2-8-0-contains-a-reachable-assertion)
- [Open5GS heap out-of-bounds read in PFCP parsing](https://junglewise.ai/threats/cve-2026-108103-open5gs-through-2-8-0-contains-a-heap-out-of-bounds-read)