CVE-2025-55181: Sending an HTTP request/response body with greater than 2^31 bytes triggers an infinite loop in…
CVE-2025-55181 · Severity: medium · CVSS 5.3 · Published 2025-12-02
Sending an HTTP request/response body with greater than 2^31 bytes triggers an infinite loop in proxygen::coro::HTTPQuicCoroSession which blocks the backing event loop and unconditionally appends data to a std::vector per-loop iteration. This issue leads to unbounded memory growth and eventually causes the process to run out of memory.
No. Junglewise Threat Intelligence has no report of CVE-2025-55181 being exploited in the wild.
How severe is CVE-2025-55181?
Medium severity, with a CVSS score of 5.3, published 2 December 2025.
Which products and versions are affected?
Facebook Proxygen. The advisory does not name versions.
Is there a fix for CVE-2025-55181?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-55181?
Check whether you run Facebook Proxygen. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.