Loading vulnerability…
CVE-2026-34181 is a low-severity input validation flaw in OpenSSL PKCS#12 file processing. When handling PKCS#12 files that use the Password-Based Message Authentication Code 1 (PBMAC1) integrity mechanism, OpenSSL fails to enforce sufficient validation of the HMAC key length. As a result, a crafted unencrypted PKCS#12 file can specify a one-byte HMAC key and still be accepted during integrity verification with a 1 in 256 probability. In deployments that rely on password-authenticated PKCS#12 files, this weakness can allow an attacker to forge a PKCS#12 container containing an attacker-controlled certificate and private key that is treated as valid by the receiving service. The issue affects OpenSSL 4.0.0 before 4.0.1, 3.6.0 before 3.6.3, 3.5.0 before 3.5.7, and 3.4.0 before 3.4.6. OpenSSL FIPS modules are not affected because the vulnerable code is outside the FIPS module boundary.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An OpenSSL vulnerability addressed in Alpine Linux 3.22.5 and 3.23.5 as part of the June 9, 2026 OpenSSL advisory.
An OpenSSL vulnerability addressed in Alpine Linux 3.24.1 as part of the June 9, 2026 advisory.
A low-severity OpenSSL PKCS#12 input validation flaw where PBMAC1 files with very short HMAC keys may be accepted, enabling certificate and private key forgery with limited probability.
A security vulnerability in OpenSSL fixed by updating OpenSSL to version 3.5.7; no further details are provided in the content.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.