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CVE-2026-112893— Pillow: Invalid free in FreeType glyph rendering when a stroker is active

Quick assessment

Affected

python-pillow Pillow

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.

Pillow 是一个 Python 图像处理库。在 10.0.0 到 13.0.0 版本期间，当使用 FreeType 进行渲染且启用了描边（stroker）功能时，Pillow 可能会释放一个无效的字形（glyph）指针。如果调用失败，清理过程可能会对一个未初始化或过期的字形变量调用。攻击者可以向使用非零描边宽度绘制文本的应用程序提供恶意构造的字体文件（以不可信字节形式），从而强制触发字形加载失败路径。这可能导致内存损坏或进程崩溃。该问题已在 13.0.0 版本中修复。

CVSS 8.2 · High Updated Oct 20, 2026

Possible ATT&CK Techniques 2 AI

T1068 · Exploitation for Privilege Escalation T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Pillow: Invalid free in FreeType glyph rendering when a stroker is active

Source: CVE Program / CVE List V5

Vulnerability Description

Pillow is a Python imaging library. From 10.0.0 until 13.0.0, Pillow can free an invalid glyph pointer during FreeType rendering with an active stroker. If FT_Load_Glyph fails, cleanup may call FT_Done_Glyph on an uninitialized or stale glyph variable. An attacker can supply a malformed font as untrusted bytes to an application that draws text with a nonzero stroke width, forcing the glyph-load failure path. This can corrupt memory or crash the process. This issue is fixed in version 13.0.0.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Source: CVE Program / CVE List V5

Vulnerability Type

使用未经初始化的变量

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
python-pillow	Pillow	>= 10.0.0, < 13.0.0	-

II. Public POCs for CVE-2026-112893

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-112893

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Other References for CVE-2026-112893 (3)

https://github.com/python-pillow/Pillow/releases/tag/13.0.0 x_refsource_MISC
https://github.com/python-pillow/Pillow/security/advisories/GHSA-j4m9-6w36-pw47 x_refsource_CONFIRM
https://github.com/python-pillow/Pillow/commit/a7416de7f3a43128179d2cf68df3240ea8dafe13 x_refsource_MISC

https://www.cve.org/CVERecord?id=CVE-2026-112893

Same Patch Batch · python-pillow · 2026-10-19 · 27 CVEs total

CVE-2026-112393	9.2 CRITICAL	Pillow: Heap buffer overflow in _tiffWriteProc when saving TIFF to BytesIO
CVE-2026-112403	9.2 CRITICAL	Pillow: Heap buffer overflow in ImagingJpegDecode
CVE-2026-112900	9.2 CRITICAL	Pillow: Argument Injection in Ghostscript call, potentially leading into RCE
CVE-2026-112398	9.2 CRITICAL	Pillow: Heap buffer overflow in FlashPix (FPX) JPEG decoding leads to code execution
CVE-2026-112896	8.8 HIGH	Pillow: TIFF encoder ColorMap plane-size mismatch causes a heap out-of-bounds read
CVE-2026-112404	8.8 HIGH	Pillow: OOB read in TiffDecode.c tile and RGBA paths leaks heap memory into pixels
CVE-2026-112894	8.7 HIGH	Pillow: Quadratic-time DoS in PDF save_all (PdfParser.next_object_id)
CVE-2026-112895	8.7 HIGH	Pillow: Unbounded recursion parsing a PDF page tree or trailer chain (incomplete fix for C
CVE-2026-112405	8.7 HIGH	Pillow: NULL pointer dereference in Image.merge via an unvalidated band 0
CVE-2026-112892	8.7 HIGH	Pillow: MSP RLE decoder expands a tiny file into unbounded memory
CVE-2026-112406	8.7 HIGH	Pillow: Infinite loop in PdfParser.rewrite_pages on page tree Parent cycle
CVE-2026-112897	8.7 HIGH	Pillow: TiffDecode returns uninitialized memory as pixels for short JPEG strips
CVE-2026-112400	8.7 HIGH	Pillow: GIF seek keeps rejected size after DecompressionBombError, allowing DoS
CVE-2026-112402	8.7 HIGH	Pillow: Double free in ImagingScaleAffine on calloc failure via Image.transform
CVE-2026-112397	8.7 HIGH	Pillow: Out-of-bounds access in _imagingmorph on a zero-width image
CVE-2026-112399	8.7 HIGH	Pillow: APNG background disposal allocates full canvas before decompression bomb check
CVE-2026-112392	8.2 HIGH	Pillow: NULL dereference in ImagingExpand via rank filters on zero-size images
CVE-2026-112390	8.2 HIGH	Pillow: Infinite loop in MIC n_frames when the embedded TIFF
CVE-2026-112898	6.9 MEDIUM	Pillow: Image.quantize() with empty palette leaks uninitialized stack memory
CVE-2026-112901	6.9 MEDIUM	Pillow: ReDoS in XbmImagePlugin: 512-byte file stalls Image.open() for minutes

Showing top 20 of 27 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Pillow

Same vendor: python-pillow

Same weakness: CWE-457

V. Comments for CVE-2026-112893

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2026-112893— Pillow: Invalid free in FreeType glyph rendering when a stroker is active

Quick assessment

Possible ATT&CK Techniques 2 AI

I. Basic Information for CVE-2026-112893

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-112893

III. Intelligence Information for CVE-2026-112893

Other References for CVE-2026-112893 (3)

Same Patch Batch · python-pillow · 2026-10-19 · 27 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2026-112893

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