CVE-2026-5089
HighSummary
YAML::Syck versions before 1.38 for Perl have an out-of-bounds read issue. This bug occurs in the base60 parsing code, potentially leading to unsafe memory reads.
Risk Assessment
Organizations may be vulnerable to attacks that exploit this bug to read memory data, potentially leading to the disclosure of sensitive information.
Recommendation
It is recommended to upgrade to YAML::Syck version 1.38 or later to mitigate this vulnerability.
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Original NVD description (English source)
YAML::Syck versions before 1.38 for Perl has an out-of-bounds read. The base60 (sexagesimal) parsing code in perl_syck.h has a buffer underflow bug in both int#base60 and float#base60 handlers. When processing the leftmost segment of a colon-separated value (e.g., the 1 in 1:30:45), the inner while loop can decrement a pointer past the start of the string buffer: while ( colon >= ptr && *colon != ':' ) { colon--; } if ( *colon == ':' ) *colon = '\0'; // colon may be ptr-1 here When no colon is found (final/leftmost segment), colon becomes ptr-1, and the subsequent *colon dereference reads one byte before the allocated buffer.