CVE-2017-16136
method-override ReDoS when untrusted user input passed into X-HTTP-Method-Override header
CVE-2017-16136 is a high vulnerability (CVSS 7.5) in Expressjs Method-override, published June 7, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.20%, the 68th percentile. Fixed in method-override 2.3.10.
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2017-16136- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-400
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2017-16136- Weakness
- CWE-400
- Updated
- 2026-11-02
EUVDEUVD-2018-0315 No score
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.
- Record
EUVD-2018-0315- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-qx2f-477c-35rq
method-override ReDoS when untrusted user input passed into X-HTTP-Method-Override header
Affected versions of method-override are vulnerable to a regular expression denial of service vulnerability when untrusted user input is passed into the X-HTTP-Method-Override header.
Recommendation
Update to version 2.3.10 or later
- Record
GHSA-qx2f-477c-35rq- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2017-16136- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-qx2f-477c-35rq
method-override ReDoS when untrusted user input passed into X-HTTP-Method-Override header
Affected versions of method-override are vulnerable to a regular expression denial of service vulnerability when untrusted user input is passed into the X-HTTP-Method-Override header.
Recommendation
Update to version 2.3.10 or later
- Record
GHSA-qx2f-477c-35rq- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
method-overridenpm |
1.0.2 to 1.0.2 | 2.3.10 |
method-overridenpm |
2.0.0 up to 2.3.10 | 2.3.10 |
method-overridenpm |
1.0.2 up to 2.3.10 | 2.3.10 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |