HOMEVULNERABILITIESCVE-2020-36661
HIGH

CVE-2020-36661

CWE-1333Published: February 12, 2023· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

A vulnerability was found in Kong lua-multipart 0.5.8-1. It has been declared as problematic. This vulnerability affects the function is_header of the file src/multipart.lua. The manipulation leads to inefficient regular expression complexity. Upgrading to version 0.5.9-1 is able to address this issue. The patch is identified as d632e5df43a2928fd537784a99a79dec288bf01b. It is recommended to upgrade the affected component. VDB-220642 is the identifier assigned to this vulnerability.

NVD Source

Technical Analysis

CVE-2020-36661 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

konghq1 product(s)
multipart
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/Kong/lua-multipart/commit/d632e5df43a2928fd537784a99a79dec288bf01b
PATCHhttps://github.com/Kong/lua-multipart/pull/34
PATCHhttps://github.com/Kong/lua-multipart/releases/tag/0.5.9-1
PATCHhttps://github.com/Kong/lua-multipart/commit/d632e5df43a2928fd537784a99a79dec288bf01b
PATCHhttps://github.com/Kong/lua-multipart/pull/34
PATCHhttps://github.com/Kong/lua-multipart/releases/tag/0.5.9-1
ADVISORYhttps://vuldb.com/?ctiid.220642
ADVISORYhttps://vuldb.com/?id.220642
ADVISORYhttps://vuldb.com/?ctiid.220642
ADVISORYhttps://vuldb.com/?id.220642

All References (10)

→
https://github.com/Kong/lua-multipart/commit/d632e5df43a2928fd537784a99a79dec288bf01bPatch
→
https://github.com/Kong/lua-multipart/pull/34Issue Tracking · Patch
→
https://github.com/Kong/lua-multipart/releases/tag/0.5.9-1Patch · Release Notes
→
https://vuldb.com/?ctiid.220642Permissions Required · Third Party Advisory
→
https://vuldb.com/?id.220642Third Party Advisory
→
https://github.com/Kong/lua-multipart/commit/d632e5df43a2928fd537784a99a79dec288bf01bPatch
→
https://github.com/Kong/lua-multipart/pull/34Issue Tracking · Patch
→
https://github.com/Kong/lua-multipart/releases/tag/0.5.9-1Patch · Release Notes
→
https://vuldb.com/?ctiid.220642Permissions Required · Third Party Advisory
→
https://vuldb.com/?id.220642Third Party Advisory

Quick Facts

CVE IDCVE-2020-36661
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-1333
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 12, 2023

Related CVEs (CWE-1333)

CVE-2026-35458
9.8
CVE-2025-62484
9.8
CVE-2023-29486
9.8
CVE-2026-25547
9.2
CVE-2023-29487
9.1
CVE-2026-41040
8.7

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-36661 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2020-36661·NVD