CVE-2026-104066— Scribus before 1.6.7 Heap Buffer Overflow via PICT 4-bit Pixel Unpacking

Quick assessment

Affected

Scribus Scribus

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.

1.6.7 版本之前的 Scribus 在 Mac PICT 图像加载器及导入插件中，于解包 4 位索引像素数据时存在堆缓冲区溢出漏洞。攻击者可构造一个宽度与行数据不一致的恶意 PICT 文件；当该文件被放置或导入时，将导致越界写入，从而引发程序崩溃或远程代码执行。

CVSS 7.8 · High Updated Oct 31, 2026

Possible ATT&CK Techniques 2 AI

T1190 · Exploit Public-Facing Application T1203 · Exploitation for Client Execution

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Vulnerability Information

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Vulnerability Title

Scribus before 1.6.7 Heap Buffer Overflow via PICT 4-bit Pixel Unpacking

Source: CVE Program / CVE List V5

Vulnerability Description

Scribus before 1.6.7 contains a heap buffer overflow vulnerability in the Mac PICT image loader and import plugin when unpacking 4-bit indexed pixel data. Attackers can supply a crafted PICT file with inconsistent width and row data that, when placed or imported, writes out of bounds, causing crashes or code execution.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

跨界内存写

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Scribus	Scribus	0 ~ 1.6.7	-

II. Public POCs for CVE-2026-104066

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-104066

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Other References for CVE-2026-104066 (4)

https://wiki.scribus.net/canvas/1.6.7_Release release-notes
https://github.com/scribusproject/scribus product
https://github.com/scribusproject/scribus/commit/d667b3b1d38e1808721315dc976d67b72070f6b4 patch
https://www.vulncheck.com/advisories/scribus-before-1.6.7-heap-buffer-overflow-via-pict-4-bit-pixel-unpacking third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-104066

Same Patch Batch · Scribus · 2026-10-30 · 7 CVEs total

CVE-2026-104062	7.8 HIGH	Scribus before 1.6.7 Heap Buffer Overflow via PICT Pixmap Loader
CVE-2026-104065	7.8 HIGH	Scribus before 1.6.7 Heap Out-of-Bounds Write via Micrografx Draw Import
CVE-2026-104067	7.8 HIGH	Scribus before 1.6.7 Out-of-Bounds Memory Access via SVM Import Plugin
CVE-2026-104061	7.8 HIGH	Scribus before 1.6.7 Heap Out-of-Bounds Write via PSD Image Loader
CVE-2026-104064	7.8 HIGH	Scribus before 1.6.7 Heap Overflow via TIFF Tile Buffer Handling
CVE-2026-104063	6.1 MEDIUM	Scribus before 1.6.7 Out-of-Bounds Read via PICT Planar Image Data

IV. Related Vulnerabilities

Same product: Scribus

Same vendor: Scribus

Same weakness: CWE-787