CVE-2020-36830

nescalante urlregex Backtracking index.js redos

HIGH
7.5
CVSS Score
Published: September 2, 2024 at 04:00 PM UTC
Updated: June 17, 2026 at 03:16 AM UTC
2 products affected across 2 vendorsUrlregexUrl Regex

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Severity
HIGH7.5
Exploit prediction
EPSS 0.8%
SSVC
PoC

Description

A vulnerability was found in nescalante urlregex up to 0.5.0 and classified as problematic. This issue affects some unknown processing of the file index.js of the component Backtracking. The manipulation leads to inefficient regular expression complexity. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 0.5.1 is able to address this issue. The identifier of the patch is e5a085afe6abfaea1d1a78f54c45af9ef43ca1f9. It is recommended to upgrade the affected component.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Affected range stops below 0.5.1, so it looks safe — our inference, not a vendor statement
0.1 ≤ v ≤ 0.50.1

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-1333

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