CVE-2026-9265Network attack vector

Heap memory disclosure via unterminated UTF8STRING buffer

Published Jun 20, 2026 · Updated Jun 20, 2026

Out-of-bounds read in Crypt::OpenSSL::PKCS12 before 1.96 allows remote attackers to disclose heap memory via crafted PKCS#12 data. print_attribute() copies a UTF8STRING attribute into a buffer sized to the declared length without adding a NUL terminator, so strlen() overreads adjacent heap data before newSVpvn() copies it into a Perl scalar. Exposure requires an application to pass attacker-controlled PKCS#12 data to info() or info_as_hash(); integrity impact is not reported.

CVSS severity9.1
Critical
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Crypt::OpenSSL::PKCS12 before 1.96 allows remote attackers to disclose heap memory via crafted PKCS#12 data. print_attribute() copies a UTF8STRING attribute into a buffer sized to the declared length without adding a NUL terminator, so strlen() overreads adjacent heap data before newSVpvn() copies it into a Perl scalar. Exposure requires an application to pass attacker-controlled PKCS#12 data to info() or info_as_hash(); integrity impact is not reported.

The record

CVE
CVE-2026-9265
Published
Jun 20, 2026
Updated
Jun 20, 2026
Vendor
Jonas B. Nielsen
Product
Crypt::OpenSSL::PKCS12
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=0 <1.96

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jonas B. Nielsen · Crypt::OpenSSL::PKCS12version=0 <1.96

Published CVSS scores

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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