CVE-2026-34181

Name
CVE-2026-34181
Description
Issue Summary: The PKCS#12 file processing fails to perform sufficient input validation for files that use Password-Based Message Authentication Code 1 (PBMAC1) integrity mechanism allowing a certificate and private key forgery. Impact Summary: An attacker impersonating a user can cause a service reading PKCS#12 files to accept forged certificates and private keys with a 1 in 256 probability. If a service accepting PKCS#12 files is using passwords for authenticating the received files, the attacker can create unencrypted PKCS#12 files that use PBMAC1 authentication that specifies an HMAC key of only one byte, allowing them to craft a file that will be accepted with a 1 in 256 probability. That would then cause the service to accept a certificate and private key controlled by the attacker. The FIPS modules are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
openssl-security@openssl.org https://github.com/openssl/security/commit/0300eb9ddce7a0895bf301a4b0c03a9da2313a0f
openssl-security@openssl.org https://github.com/openssl/security/commit/79eb76a937e474bb7610a0a3dc57131dc8dc6610
openssl-security@openssl.org https://github.com/openssl/security/commit/85dcbb3abaa4878af5c8fbbe11bce708fcf984a7
openssl-security@openssl.org https://github.com/openssl/security/commit/ec36f2417c4ddd8cabce4b4a60a3d7a7365f2d81
openssl-security@openssl.org https://openssl-library.org/news/secadv/20260609.txt
openssl-security@openssl.org https://github.com/openssl/openssl/commit/0300eb9ddce7a0895bf301a4b0c03a9da2313a0f
openssl-security@openssl.org https://github.com/openssl/openssl/commit/79eb76a937e474bb7610a0a3dc57131dc8dc6610
openssl-security@openssl.org https://github.com/openssl/openssl/commit/85dcbb3abaa4878af5c8fbbe11bce708fcf984a7
openssl-security@openssl.org https://github.com/openssl/openssl/commit/ec36f2417c4ddd8cabce4b4a60a3d7a7365f2d81

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* openssl >= 3.4.0 < 3.4.6
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* openssl >= 3.5.0 < 3.5.7
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* openssl >= 3.6.0 < 3.6.3
cpe:2.3:a:openssl:openssl:4.0.0:-:*:*:*:*:*:* openssl == None == 4.0.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
openssl edge-main 3.5.7-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
openssl edge-main 3.5.6-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl edge-main 3.5.5-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl edge-main 3.5.5-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl edge-main 3.5.4-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl edge-main 3.5.3-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl edge-main 3.5.3-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl edge-main 3.5.3-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl edge-main 3.5.2-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl edge-main 3.5.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl edge-main 3.5.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl 3.24-main 3.5.7-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
openssl 3.23-main 3.5.7-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
openssl 3.23-main 3.5.6-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl 3.23-main 3.5.5-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl 3.23-main 3.5.4-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl 3.22-main 3.5.7-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
openssl 3.22-main 3.5.6-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl 3.22-main 3.5.5-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl 3.22-main 3.5.4-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl 3.22-main 3.5.3-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl 3.22-main 3.5.3-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl 3.22-main 3.5.2-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl 3.22-main 3.5.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
openssl 3.22-main 3.5.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable