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 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.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/dsully/perl-crypt-openssl-x509/commit/757289bfce095455c104d4adfe9312e7b339620f.patch	Patch
https://metacpan.org/release/JONASBN/Crypt-OpenSSL-X509-2.1.3/source/Changes.md	Release Notes

Configurations

Configuration 1 (hide)

cpe:2.3:a:jonasbn:crypt\:\:openssl\:\:x509:*:*:*:*:*:perl:*:*

History

No history.

Information

Published : 2026-07-13 23:16

Updated : 2026-08-11 01:19

NVD link : CVE-2026-58102

Mitre link : CVE-2026-58102

CVE.ORG link : CVE-2026-58102

JSON object : View

Products Affected

jonasbn

crypt\

CWE

CWE-125

Out-of-bounds Read

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