CVE WatchJul 14, 2026

CVE-2026-58102

Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow a heap out-of-bounds read via a long certificate extension OID in hv_exts. When b

CVSS

9.1

Critical

EPSS

0.2%

p13

KEV

—

Exploit Today

0-100

Published: Jul 13, 2026 · Last modified: Jul 14, 2026 · CWE-125

EPSS · 30d

0.1%EPSS · 30 days0.2%

2026-07-142026-07-18

Technical description

Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow a heap out-of-bounds read via a long certificate extension OID in hv_exts. When building the extension hash (via extensions(), extensions_by_long_name(), extensions_by_oid(), or has_extension_oid()), the code passes OBJ_obj2txt()'s return value as the hash-key length; because that value is the OID's full text length rather than the bytes written to the fixed-size buffer (129 bytes), an OID whose text is longer than the 129-byte buffer causes a read past the allocation, exposing adjacent heap memory as the returned hash key. extensions_by_name() uses the static shortname path and is not affected.

Official references

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