Heap corruption via OCSP request double free from crafted multi-URL certificate in TLS client

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Affected scope and exposure questions

The current feed maps MongoDB/C Driver (generic). Check affected ranges and fixed versions before updating.

Recommended response

1. 1Check inventory. Check lockfiles and deployed manifests for MongoDB/C Driver.
2. 2Review the reported fix. Update MongoDB/C Driver to 1.30.9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

1. Published upstream

   Sep 3, 2026

   Evidence: source:cvelist:source_dates:source-dates:record

2. Source modified

   Sep 3, 2026

   Evidence: source:cvelist:source_dates:source-dates:record

3. First seen by HOL

   Sep 3, 2026

Sources and claim methodology

• Source referencejira.mongodb.org

Related CVEs

• Silent field truncation via unchecked int cast of huge JSON string values in JSON-to-BSON parserSame mongodb/c driver package
• Heap write primitive via size round-up wrap during JSON parsing on 32-bit buildsSame mongodb/c driver package
• Heap overflow via truncated base64 encoding of binary fields in length-limited JSON outputSame mongodb/c driver package
• Signum Node: Integer overflow in SMART_FEES fee distribution allows arbitrary miner reward inflationSame generic ecosystem
• Note Mark: Unauthenticated disclosure of soft-deleted note metadata via deleted=true on public books in note-markSame generic ecosystem
• pymonocypher: Potential heap buffer overflow on nb_blocks in argon2i_32 when provided buffer is too smallSame generic ecosystem