Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Jonasbn | Crypt\ | < 2.1.3, \ |
Related Weaknesses (CWE)
References
- https://github.com/dsully/perl-crypt-openssl-x509/commit/757289bfce095455c104d4aPatch
- https://metacpan.org/release/JONASBN/Crypt-OpenSSL-X509-2.1.3/source/Changes.mdRelease Notes
FAQ
What is CVE-2026-58102?
CVE-2026-58102 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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_...
How severe is CVE-2026-58102?
CVE-2026-58102 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-58102?
Check the references section above for vendor advisories and patch information. Affected products include: Jonasbn Crypt\.