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CVE-2025-55181

Published: Dec 2, 2025Updated: Dec 19, 2025 Sources: CVE List NVDCWE-834
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.3%
Top 83.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-834

Affected Products

proxygenfacebookCommunications
proxygenFacebookCommunications
facebookcommercialUSCommunicationsaka meta, facebook inc.

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/facebook/proxygen/commit/17689399ef99b7c3d3a8b2b768b1dba1a4b72f8f
github.com
https://www.facebook.com/security/advisories/cve-2025-55181
facebook.com

Timeline

Published
Dec 2, 2025
Last Updated
Dec 19, 2025

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