# CVE-2026-52296 — FFmpeg

> As of 2026-09-13, CVE-2026-52296 is a LOW-severity vulnerability in FFmpeg, CVSS v3.1 2.9, EPSS 0.1% (5.3th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-52296 as of 2026-09-13; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-13

## What is CVE-2026-52296?

FFmpeg before 9.0 has an out-of-bounds read because of missing required padding in WMA extradata allocation paths in libavcodec/wmaenc.c.

The record classifies CVE-2026-52296 under weakness class [CWE-125](https://intel.threadlinqs.com/cwe/CWE-125). Its CVSS v3 base vector states that the flaw requires local access to the host, needs no prior authentication, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 22 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 2.9 — LOW (`CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 5.3% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 1.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-13

## Is CVE-2026-52296 being exploited?

It currently carries a trending score of 31 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **FFmpeg**: FFmpeg

## How to fix CVE-2026-52296

No vendor patch reference has been recorded for CVE-2026-52296 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-2026-52296

No threat campaign in the Threadlinqs corpus currently references CVE-2026-52296, 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, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-09-14. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [github.com](https://github.com/Kenan-Kamel/VulnerabilitiesReference/tree/main/FFmpeg/ExtradataPadding)
- [code.ffmpeg.org](https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22988)
- [git.ffmpeg.org](https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/23227a444de4a8f7696f46660cdd044b460f7e47)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-52296
Full detection coverage and IOCs for threats exploiting CVE-2026-52296 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp