CVE-2026-4177 | BDVDB-2026-320708 Detail

Description#

YAML::Syck versions through 1.36 for Perl has several potential security vulnerabilities including a high-severity heap buffer overflow in the YAML emitter. The heap overflow occurs when class names exceed the initial 512-byte allocation. The base64 decoder could read past the buffer end on trailing newlines. strtok mutated n->type_id in place, corrupting shared node data. A memory leak occurred in syck_hdlr_add_anchor when a node already had an anchor. The incoming anchor string 'a' was leaked on early return.

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History#

1. Version 12026-03-16Record published in the CVE List.
2. Version 22026-07-15Most recent update recorded in the CVE List.