No exploitation reportedFix available

CVE-2017-16136

Q: Is CVE-2017-16136 actively exploited?

Active exploitation of CVE-2017-16136 has not been confirmed. Its EPSS score was 1.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2017-16136?

CVE-2017-16136 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2018-06-07
Fixed in2.3.10
WeaknessCWE-400

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

method-override is a module used by the Express.js framework to let you use HTTP verbs such as PUT or DELETE in places where the client doesn't support it. method-override is vulnerable to a regular expression denial of service vulnerability when specially crafted input is passed in to be parsed via the X-HTTP-Method-Override header.

Timeline

dates in UTC

2018-06-0702:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-16136?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-16136?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Expressjs method-override

Branch	Affected	Fixed in	Source
2.3	< 2.3.10	2.3.10	NVD
2.3	≥ 1.0.2, < 2.3.10	2.3.10	OSV
2.x	≥ 2.0.0, < 2.3.10	2.3.10	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Expressjs method-override to 2.3.10

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.07.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
CNAweakness (CWE)CWE-400read 2026-10-23
NVDweakness (CWE)CWE-400read 2026-10-23
FIRST EPSSEPSS score1.2 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2018-06-07
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2017-16136?

Is CVE-2017-16136 actively exploited?

Active exploitation of CVE-2017-16136 has not been confirmed. Its EPSS score was 1.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-16136?

CVE-2017-16136 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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