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CVE-2026-4177

Опубликовано: 16 мар. 2026
Источник: nvd
CVSS3: 9.1
CVSS3: 7.3
EPSS Низкий

Описание

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.

Уязвимые конфигурации

Конфигурация 1
cpe:2.3:a:toddr:yaml\:\:syck:*:*:*:*:*:perl:*:*
Версия до 1.37 (исключая)

EPSS

Процентиль: 35%
0.00429
Низкий

9.1 Critical

CVSS3

7.3 High

CVSS3

Дефекты

CWE-122
CWE-120

Связанные уязвимости

CVSS3: 9.1
ubuntu
5 месяцев назад

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.

CVSS3: 7.3
redhat
5 месяцев назад

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.

CVSS3: 9.1
debian
5 месяцев назад

YAML::Syck versions through 1.36 for Perl has several potential securi ...

CVSS3: 9.1
github
5 месяцев назад

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.

oracle-oval
4 месяца назад

ELSA-2026-6470: perl-YAML-Syck security update (IMPORTANT)

EPSS

Процентиль: 35%
0.00429
Низкий

9.1 Critical

CVSS3

7.3 High

CVSS3

Дефекты

CWE-122
CWE-120