CVE-2026-66040Disclosure(ffmpeg / ffmpeg)

LOWCVSS 8.8 · HIGH

Signal is active with 2 mentions in latest observed window

Immediate actions

Patch ffmpeg ffmpeg systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

FFmpeg through 8.1.2, fixed in commit b506faf, contains a heap out-of-bounds write vulnerability in the native PNG and APNG encoders that allows remote attackers to corrupt heap memory by supplying a crafted PNG image with a malicious eXIf chunk. Attackers can craft an eXIf chunk where multiple IFD entries reference the same large value payload, causing canonical serialization to expand the output far beyond the undersized allocation estimated by add_exif_profile_size(), resulting in png_write_chunk() writing tens of thousands of bytes past the buffer boundary, leading to deterministic heap corruption, process crash, and potentially arbitrary code execution.

ffmpeg CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Patch / fix

Vendor / third-party advisories

https://www.vulncheck.com/advisories/ffmpeg-heap-out-of-bounds-write-via-png-apng-exif-encoder

Weakness type (CWE)

CWE-122

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

ffmpeg

Threat summary

Patch or workaround signal is available
4 mentions across 2 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 4 signals
Technical details provided in 4 signals
Disclosure: 2 classified signals
Peaked 1d ago at 2 mentions (2026-07-24); latest day: 2
4 total mentions across 2 days

Affected systems

Vendors

ffmpeg

Products

ffmpeg

Deep dive

Activity timeline4 mentions / 2d

Signal classification2 categories

Disclosure

250.0%

Patch

250.0%

Referenced assets2 URLs

By indicator

Full discourse4 posts

Rıdvan Yağlı@ridvanyagli87d
Disclosure
🔴 FFmpeg'te 6 yeni önemli güvenlik açığı (CVE-2026-66036, CVE-2026-66037, CVE-2026-66038, CVE-2026-66039, CVE-2026-66040 ve CVE-2026-66041) keşfedildi. Açıklar; kötü amaçlı hazırlanmış video, ses, altyazı ve PNG dosyaları aracılığıyla bellek bozulmasına, hizmet reddine (DoS), bilgi sızıntısına ve bazı senaryolarda uzaktan kod çalıştırmaya (RCE) yol açabiliyor. FFmpeg 8.1.2 ve daha eski sürümler risk altında. FFmpeg'i yamalı sürüme, FFmpeg kullanan uygulamalarınızı ise en güncel sürüme yükseltin.
Post summary
Six new FFmpeg CVEs have been disclosed, exposing memory corruption, DoS, information leakage, and possible remote code execution; users are urged to patch to a fixed and latest version.
00001152
1.3K followersView on X
TECHEPAGES@techepages88d
Patch
FFmpeg Security Advisory: Multiple high-severity vulnerabilities (CVSS up to 7.7) have been disclosed and patched upstream — organizations should update immediately and avoid processing untrusted media with risky filter configurations. 🔵 CVE-2026-66036 – Heap corruption via vf_hqdn3d filter 🔵 CVE-2026-66041 – Buffer overflow via vf_quirc/subtitle parsing 🔵 CVE-2026-66039 – Integer/heap overflow in MACE6 audio decoder 🔵 CVE-2026-66040 – Heap corruption in PNG/APNG encoder 🔵 CVE-2026-66037 – Memory exhaustion via IAMF demuxer 🔵 CVE-2026-66038 – Uninitialized memory disclosure in LCL/ZLIB decoder Recommended Action: Update FFmpeg to a version incorporating the upstream fixes (commits 5d7112c, 8670835, e7cbfd1, aafb5c6, b506faf, 4da9812).
Post summary
The advisory highlights several high‑severity FFmpeg CVEs, confirms that upstream patches are available, and urges users to immediately update to the fixed versions.
0000034
35 followersView on X
Infoflowcloud@infoflowcloud91d
Patch
🚨*CVE* CVE-2026-66040 FFmpeg through 8.1.2, fixed in commit b506faf, contains a heap out-of-bounds write vulnerability in the native PNG and APNG encoders that allows remote attackers to c… https://www.cve.org/CVERecord?id=CVE-2026-66040 ----- Traducción: CVE-2026-66040 FFm… http://infoflow.cloud`
Post summary
The post reports a heap out-of-bounds write vulnerability in FFmpeg’s PNG/APNG encoders and notes it is fixed in commit b506faf, without mentioning any PoC or active exploitation.
0000038
94 followersView on X
CVE@CVEnew91d
Disclosure
CVE-2026-66040 FFmpeg through 8.1.2, fixed in commit b506faf, contains a heap out-of-bounds write vulnerability in the native PNG and APNG encoders that allows remote attackers to c… https://www.cve.org/CVERecord?id=CVE-2026-66040
Post summary
The snippet announces CVE‑2026‑66040, detailing a heap out‑of‑bounds write in FFmpeg’s PNG/APNG encoders and notes that the issue was fixed in a specific commit.
00000831
57.9K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	ffmpeg	ffmpeg	-	-	-

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What researchers are saying

CVE-2026-66040

Rıdvan Yağlı[verified]@ridvanyagliDisclosure

Six new FFmpeg CVEs have been disclosed, exposing memory corruption, DoS, information leakage, and possible remote code execution; users are urged to patch to a fixed and latest version.

TECHEPAGES[verified]@techepagesPatch

The advisory highlights several high‑severity FFmpeg CVEs, confirms that upstream patches are available, and urges users to immediately update to the fixed versions.

Infoflowcloud@infoflowcloudPatch

The post reports a heap out-of-bounds write vulnerability in FFmpeg’s PNG/APNG encoders and notes it is fixed in commit b506faf, without mentioning any PoC or active exploitation.

CVE@CVEnewDisclosure

The snippet announces CVE‑2026‑66040, detailing a heap out‑of‑bounds write in FFmpeg’s PNG/APNG encoders and notes that the issue was fixed in a specific commit.