Loading vulnerability…
CVE-2026-63076 is a NULL/invalid pointer dereference in OpenSSL Certificate Management Protocol (CMP) password-based MAC (PBM) protection verification. During verification, OpenSSL obtains the protectionAlg parameter and its ASN.1 type, but checks only that the returned value pointer is non-NULL before casting it as the expected PBMParameter structure. It does not validate that the ASN.1 type is appropriate. A crafted CMP message carrying a protectionAlg parameter of a different ASN.1 type can therefore cause OpenSSL to dereference an invalid pointer. The flaw affects OpenSSL 3.0, 3.4, 3.5, 3.6, and 4.0 branches; OpenSSL 1.1.1 and 1.0.2 are not affected. CMP functionality must be explicitly enabled by the application. The vulnerable code is outside the OpenSSL 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.
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Moderate-severity remotely triggerable invalid-pointer dereference in OpenSSL Certificate Management Protocol password-based MAC validation. An unauthenticated attacker can crash a CMP server, or a malicious/intercepted server can crash a CMP client.
A remote unauthenticated denial-of-service vulnerability in OpenSSL CMP PBM protection verification. Affected CMP servers accepting PBM-protected messages, and CMP clients communicating with a malicious or intercepted server, can be crashed.
A network-accessible, low-complexity denial-of-service vulnerability (CVSS 3.0 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) affecting listed Debian Linux and Red Hat Enterprise Linux package configurations, including OpenSSL and EDK2-related packages.
An OpenSSL-related vulnerability referenced by CVE ID only; the content provides no technical details.
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.