What’s Vulnerable › Vulnerabilities

CVE-2020-36661: Kong lua-multipart multipart.lua is_header redos

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-02-12 · updated 2026-06-17
• Weakness: CWE-1333

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.

Affected products

• Kong lua-multipart: 0.5.8-1

References

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

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