GHSA-x424-64qh-5j54: react/http (CVE-2026-84997)

Package	Ecosystem	Affected	Fixed in
react/http	Packagist	>=0.6.0, <1.11.1	1.11.1

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The react/http package, versions 0.6.0 up to but not including 1.11.1, can loop forever while decoding malformed chunked Transfer-Encoding bodies. A remote client sending such a request to a server, or a malicious or compromised server answering a client's request, can freeze the single-threaded process and peg a CPU core until it is killed. Upgrade react/http to version 1.11.1 or later.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0066, the 51st percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 13:55 UTC First seen by agentprime
31 Oct 2026, 13:55 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.