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CVE-2025-11683 is an out-of-bounds read vulnerability in YAML::Syck for Perl, affecting versions before 1.36. The flaw is caused by missing null terminators in the bundled libsyck lexer code in token.c, which allows parsing logic to read past the intended end of a token buffer. The issue is triggered when parsing complex YAML input, particularly structures consisting of hashes with keys and empty values, where adjacent in-memory variables may be read due to improper string termination handling. The vulnerability is associated with lexer processing paths that assume null-terminated input and can over-read into adjacent allocated memory.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.