CVE-2026-124031— GPAC through 26.07.0 Type Confusion via drawable_get_aspect_2d_mpeg4

Quick assessment

Affected

gpac gpac

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GPAC 26.07.0 及更早版本在和函数中存在类型混淆漏洞。这两个函数在将 Shape 的外观节点（appearance node）强制转换为类型时，未检查其节点标签（node tag）。攻击者可构造恶意的 XMT 文件，在外观字段中嵌入其他类型的节点（例如 Conditional 节点），从而触发无效内存读取并导致 MP4Box 崩溃。

CVSS 5.5 · Medium Updated Nov 07, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

Vendor	Product	Version Range	Status
gpac	gpac	`≤ 26.07.0`	affected

Get alerts for future matching vulnerabilities Log in to subscribe

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

GPAC through 26.07.0 Type Confusion via drawable_get_aspect_2d_mpeg4

Source: CVE Program / CVE List V5

Vulnerability Description

GPAC through 26.07.0 contains a type confusion vulnerability in drawable_get_aspect_2d_mpeg4() and TraverseShape() that casts a Shape's appearance node to M_Appearance without checking its node tag. Attackers can supply a crafted XMT file placing another node type, such as Conditional, in the appearance field to trigger an invalid memory read and crash MP4Box.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

使用不兼容类型访问资源(类型混淆)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
gpac	gpac	0 ~ 26.07.0	-

II. Public POCs for CVE-2026-124031

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-124031

请登录查看更多情报信息。

Other References for CVE-2026-124031 (6)

https://github.com/gpac/gpac/commit/43a8329a90ae2907716b593cc3746458516c7c39 patch
https://github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/222/222_gf_node_get_tag_compositor_texturing_c_370.xmt exploit
https://github.com/gpac/gpac/blob/v26.07.0/src/compositor/drawable.c#L564-L565 technical-description
https://github.com/gpac/gpac product
https://github.com/gpac/gpac/issues/4030 issue-tracking
https://www.vulncheck.com/advisories/gpac-through-26.07.0-type-confusion-via-drawable-get-aspect-2d-mpeg4 third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-124031

IV. Related Vulnerabilities

Same product: gpac

Same vendor: gpac

Same weakness: CWE-843