# CVE-2026-82587 — Open5GS

> As of 2026-08-30, CVE-2026-82587 is a MEDIUM-severity vulnerability in Open5GS, CVSS v3.1 4.3. No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-82587 as of 2026-08-30; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-08-30

## What is CVE-2026-82587?

A vulnerability was determined in Open5GS up to 2.7.7. This vulnerability affects the function amf_namf_comm_decode_ue_mm_context_list of the file src/amf/namf-handler.c of the component AMF. This manipulation of the argument ueContext.mmContextList[*].allowedNssai causes memory corruption. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 2.8.0 is able to resolve this issue. Patch name: abf8a836564b966b5141110fc25ed413c4f17522. It is recommended to upgrade the affected component.

The record classifies CVE-2026-82587 under weakness class [CWE-119](https://intel.threadlinqs.com/cwe/CWE-119). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 36 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 4.3 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C`)
- **CVSS v4.0 base score:** 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P`)
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-30

## Is CVE-2026-82587 being exploited?

It currently carries a trending score of 30 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **(vendor unspecified)**: Open5GS

## How to fix CVE-2026-82587

No vendor patch reference has been recorded for CVE-2026-82587 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-82587

No threat campaign in the Threadlinqs corpus currently references CVE-2026-82587, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, GitHub Security Advisories. Last verified by Threadlinqs on 2026-08-31.

**Vendor advisory and patch**

- [github.com — patch](https://github.com/open5gs/open5gs/commit/abf8a836564b966b5141110fc25ed413c4f17522)
- [github.com — patch (v2.8)](https://github.com/open5gs/open5gs/releases/tag/v2.8.0)

**Exploit and proof of concept**

- [github.com — exploit](https://github.com/open5gs/open5gs/issues/4398)

**Technical analysis**

- [vuldb.com — vdb entry](https://vuldb.com/vuln/397082)

**Third-party advisory**

- [vuldb.com — signature](https://vuldb.com/vuln/397082/cti)
- [vuldb.com — third party advisory](https://vuldb.com/cve/CVE-2026-82587)
- [vuldb.com — third party advisory (891890)](https://vuldb.com/submit/891890)

**Issue tracking and product pages**

- [github.com — product](https://github.com/open5gs/open5gs/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-82587
Full detection coverage and IOCs for threats exploiting CVE-2026-82587 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp