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CVE-2020-26310

GHSL-2020-305: Regular Expression Denial of Service (ReDoS) in Pure JavaScript HTML5 Parser

HIGH
8.7
CVSS Score
Published: October 26, 2024 at 08:26 PM UTC
Updated: June 17, 2026 at 03:08 AM UTC
1 product affected across 1 vendorPure JavaScript HTML5 Parser

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Severity
HIGH8.7
Exploit prediction
EPSS 0.4%
SSVC
PoC

Description

Validate.js provides a declarative way of validating javascript objects. All versions as of 30 November 2020 contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). As of time of publication, it is unknown if any patches are available.

Affected

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

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: [email protected]
https://github.com/blowsie/Pure-JavaScript-HTML5-Parser/issues/14
Source: [email protected]
https://securitylab.github.com/advisories/GHSL-2020-305-redos-Pure-JavaScript-HTML5-Parser/

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

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

CVSS

8.7HIGHGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-1333

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