Pillow: Invalid free in FreeType glyph rendering when a stroker is active
Severity and exploitation
KEV coverage does not rule out exploitation.
Assessment vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NSeverity
high8.2CVSS measures technical severity, not the likelihood of an attack.
Known exploitation
Not listed in the checked CISA KEV catalog
Absence from CISA KEV does not rule out attacks.
Public exploit
Exploit reference published
Source-linked evidence; not proof of attacks in the wild or independent validation.
Remediation
Fix status not established
No structured fix or guidance is available here. Check the latest publisher advisory.
What this means
Pillow, a Python imaging library, has a vulnerability in versions 10.0.0 to 13.0.0 where an attacker can supply a malformed font, causing memory corruption or a crash. The issue occurs when FreeType rendering fails with an active stroker. This can be triggered by untrusted font bytes in an application drawing text with a nonzero stroke width.
Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.Attack conditions
No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.
Review supporting sources →Affected versions
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python-pillow · GitHub_M
Pillow
1 range
python-pillow · GitHub_M
Pillow
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affected
>= 10.0.0, < 13.0.0
Other versions: unknown
What to do
Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.
No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.
cve.new guidance unless attributed to a publisher. This page does not inspect your installation.
Public exploit evidence
The sources identify public exploit references. We have not independently tested them; their availability does not establish exploitation in the wild.
python-pillow/Pillow · security/advisories/GHSA-j4m9-6w36-pw47 ↗Attributed to CISA-ADPOriginal source description
Read the full publisher 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.
References
3 sourcesInside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-112893View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Underlying weaknesses
The source’s classification of what caused the vulnerability.
Contributing organizations · 2
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Timeline
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Source updated
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Last imported by cve.new
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What changed
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