CVE-2026-5089
Gravedad CVSS v3.1:
ALTA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
12/05/2026
Última modificación:
14/05/2026
Descripción
*** Pendiente de traducción *** YAML::Syck versions before 1.38 for Perl has an out-of-bounds read.<br />
<br />
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:<br />
<br />
while ( colon >= ptr && *colon != &#39;:&#39; )<br />
{<br />
colon--;<br />
}<br />
if ( *colon == &#39;:&#39; ) *colon = &#39;\0&#39;; // colon may be ptr-1 here<br />
<br />
When no colon is found (final/leftmost segment), colon becomes ptr-1, and the subsequent *colon dereference reads one byte before the allocated buffer.
Impacto
Puntuación base 3.x
7.30
Gravedad 3.x
ALTA
Referencias a soluciones, herramientas e información
- https://github.com/cpan-authors/YAML-Syck/commit/208a4d3bd1b5cdb4a791a6e3905bd6bd45e9d005.patch
- https://github.com/cpan-authors/YAML-Syck/issues/132
- https://github.com/cpan-authors/YAML-Syck/pull/133
- https://metacpan.org/release/TODDR/YAML-Syck-1.38/changes
- http://www.openwall.com/lists/oss-security/2026/05/12/16
- https://github.com/cpan-authors/YAML-Syck/issues/132