Code execution via unvalidated SFD deserialization
Published Dec 31, 2025 · Updated Dec 31, 2025
Deserialization of untrusted data in FontForge SFD parsing allows remote attackers to execute code by opening a crafted font file. The SFD parser reconstructs serialized user-supplied data without adequate validation, allowing attacker-controlled content to execute in the current process. Exploitation requires the target to visit a malicious page or open a malicious file; the affected field and parser function are undisclosed.
Summary
What happened
Deserialization of untrusted data in FontForge SFD parsing allows remote attackers to execute code by opening a crafted font file. The SFD parser reconstructs serialized user-supplied data without adequate validation, allowing attacker-controlled content to execute in the current process. Exploitation requires the target to visit a malicious page or open a malicious file; the affected field and parser function are undisclosed.
The record
- CVE
- CVE-2025-15276
- Published
- Dec 31, 2025
- Updated
- Dec 31, 2025
- Vendor
- FontForge
- Product
- FontForge
- Classifications
- CWE-502, T1204.002, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 31, 2025CVE publishedPublication date reported by the CVE source.
- Dec 31, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=836f4e11e4cb890353393b36c0465ef445e0c4d4
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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