Regular Expression Denial of Service in negotiator

Also known as GHSA-7mc5-chhp-fmc3

Published 8 y ago 2018-05-31 · modified 4 mo ago 2026-06-17 · JSON

CVSS

7.5

v3.0 · NVD

CISA KEV

not known exploited

EPSS

1.4%

percentile 72%

Public exploits

none known

negotiator is an HTTP content negotiator for Node.js and is used by many modules and frameworks including Express and Koa. The header for "Accept-Language", when parsed by negotiator 0.6.0 and earlier is vulnerable to Regular Expression Denial of Service via a specially crafted string.

Exploit prediction (EPSS)

1.39% probability of exploitation in the next 30 days, higher than 72% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
NVD	3.0	7.5	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`
NVD	2.0	5.0	`AV:N/AC:L/Au:N/C:N/I:N/A:P`

Affected packages

Ecosystem	Package	Affected	Fixed in
npm	`negotiator`	<0.6.1	0.6.1

Affected products

HackerOne negotiator node module

Classification

Weakness

CWE-400 Uncontrolled Resource Consumption
CWE-20 Improper Input Validation

References

nodesecurity.io /advisories/106 · x_refsource_MISC, x_transferred
nvd.nist.gov /vuln/detail/CVE-2016-10539 · advisory
github.com /advisories/GHSA-7mc5-chhp-fmc3 · advisory
npmjs.com /advisories/106 · web

Sources

CVE List: CVE-2016-10539
GitHub Advisory: GHSA-7mc5-chhp-fmc3
NVD: CVE-2016-10539

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.

Summary