Loading vulnerability…
CVE-2026-74876 is a critical vulnerability in openssl_encrypt before version 1.4.0 caused by improper signature verification when constructing public key bundles from untrusted input. The flaw resides in PublicKeyBundle.from_dict(), which creates a PublicKeyBundle object from attacker-supplied data without verifying the bundle's signature. Because the resulting bundle can then be passed to to_identity() without prior verification, untrusted key material can be converted into an identity object and used as if it were authentic. This breaks the trust model for public key distribution and allows attacker-controlled public keys to be accepted in place of legitimate keys during encryption operations.
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.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical signature verification flaw in openssl_encrypt before 1.4.0 where unverified key bundles can be converted into identities, potentially causing encryption to attacker-controlled keys.
A vulnerability in openssl_encrypt before version 1.4.0 where PublicKeyBundle.from_dict() accepts untrusted data without verifying signatures, allowing attackers to supply attacker-controlled public keys and cause encryption of data to those keys, resulting in secret leakage.
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.