CVE-2026-58102: Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow a heap out-of-bounds read via a long certificate ext

Q: How do I fix CVE-2026-58102?

crypt\: upgrade to 2.1.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-58102 being exploited?

CVE-2026-58102 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-58102 affect?

CVE-2026-58102 affects crypt\. Severity is critical (CVSS 9.1). 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

Q: How urgent is CVE-2026-58102?

Priority 48/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

This month

CRITICAL 9.1REMOTEWATCHLISTUPGRADE

CVE-2026-58102 is a critical-severity flaw (CVSS 9.1) affecting crypt\. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 OI

Why this priority

Critical severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 74%)
CISA exploited list	No
Weakness	CWE-125
Published	2026-07-13
Last modified	2026-10-24

Publisher (CNA): CPANSec · Vendor: jonasbn

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-13 23:16 UTCPublished CVE record published
2026-10-24 22:10 UTCUpdated Record last modified

jonasbn crypt\ UPGRADE

Affected: < 2.1.3

Fixed in: 2.1.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy crypt || rpm -q crypt || crypt --version

2. UPGRADE to 2.1.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade crypt

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade crypt

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-58102?

crypt\: upgrade to 2.1.3. Exact commands for each OS are on this page.

Is CVE-2026-58102 being exploited?

CVE-2026-58102 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-58102 affect?

CVE-2026-58102 affects crypt\. Severity is critical (CVSS 9.1). 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

How urgent is CVE-2026-58102?

Priority 48/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

OpenSSL vulnerabilities · Perl vulnerabilities

Related CVEs

CVE-2026-58101 HIGH 7.5 UPGRADE Crypt::OpenSSL::X509 versions before 2.1.3 for Perl allow denial of service via NULL pointer dereference. X50

References

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