CVE-2026-116372 MISP mispguard: Feed responses with 2xx status codes other than 200 bypass filtering rules

MISP mispguard is a security filtering proxy that inspects and blocks MISP feed responses based on configured rules. The processfeedresponse method in src/mispguard.py was responsible for evaluating feed responses before they reached the MISP instance. The original logic only explicitly handled t...

CVE-2026-116372

The MISP mispguard security filtering proxy contains a vulnerability in the process_feed_response method of src/mispguard.py. The software incorrectly assumes that only non-200 HTTP status codes bypass filtering, but it also allows other 2xx status codes (such as 201 , 203 , and 206 ) to pass thr...