# CVE-2026-82590 — Open5GS

> As of 2026-08-30, CVE-2026-82590 is a MEDIUM-severity vulnerability in Open5GS, CVSS v3.1 4.3, EPSS 0.3% (23.2th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-82590 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-2026-82590?

A weakness has been identified in Open5GS up to 2.7.7. The affected element is the function smf_nudm_sdm_handle_get of the file src/smf/nudm-handler.c of the component SMF. Executing a manipulation of the argument preemptCap can lead to reachable assertion. The attack may be launched remotely. Upgrading to version 2.8.0 is sufficient to fix this issue. This patch is called 4554405f29bffd7562abedbee63484825bd90cd5. You should upgrade the affected component.

The record classifies CVE-2026-82590 under weakness class [CWE-617](https://intel.threadlinqs.com/cwe/CWE-617). 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:X/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:X`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 23.2% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-30

## Is CVE-2026-82590 being exploited?

It currently carries a trending score of 36 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **(vendor unspecified)**: Open5GS

## How to fix CVE-2026-82590

No vendor patch reference has been recorded for CVE-2026-82590 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-2026-82590

No threat campaign in the Threadlinqs corpus currently references CVE-2026-82590, 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, FIRST EPSS. Last verified by Threadlinqs on 2026-08-31.

**Vendor advisory and patch**

- [github.com — patch](https://github.com/open5gs/open5gs/commit/4554405f29bffd7562abedbee63484825bd90cd5)
- [github.com — patch (v2.8)](https://github.com/open5gs/open5gs/releases/tag/v2.8.0)

**Technical analysis**

- [vuldb.com — vdb entry](https://vuldb.com/vuln/397085)

**Third-party advisory**

- [vuldb.com — signature](https://vuldb.com/vuln/397085/cti)
- [vuldb.com — third party advisory](https://vuldb.com/cve/CVE-2026-82590)
- [vuldb.com — third party advisory (891893)](https://vuldb.com/submit/891893)

**Issue tracking and product pages**

- [github.com — issue tracking](https://github.com/open5gs/open5gs/issues/4455)
- [github.com — product](https://github.com/open5gs/open5gs/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-82590
Full detection coverage and IOCs for threats exploiting CVE-2026-82590 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp