CVE-2025-55181 Details
Description
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.
A denial-of-service vulnerability has been identified in Facebook Proxygen versions v2025.08.25.00 through v2025.12.01.00. The issue arises when an HTTP request or response body exceeds 2^31 bytes, causing an infinite loop in the 'proxygen::coro::HTTPQuicCoroSession' component. This loop blocks the event loop and continuously adds data to a vector with each iteration, leading to unbounded memory growth and eventually causing the process to run out of memory.
Users can update to the latest version of Facebook Proxygen, as this vulnerability has been addressed in the v2025.12.02.00 release.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Dec 3, 2025References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-834 | Excessive Iteration | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| facebook proxygen | >= 2025.08.25.00, <= 2025.12.01.00 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Dec 19, 2025 | Initial Analysis | [email protected] |
| Dec 3, 2025 | CVE Modified | CISA-ADP |
| Dec 2, 2025 | New CVE Received | [email protected] |