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CVE-2020-26303

GHSL-2020-289: Regular Expression Denial of Service (ReDoS) in insane

HIGH
7.5
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 vendorInsane

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Severity
HIGH7.5
Exploit prediction
EPSS 0.5%
SSVC
PoC

Description

insane is a whitelist-oriented HTML sanitizer. Versions 2.6.2 and prior contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). As of time of publication, no known patches are available.

Affected

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

Insane· Bevacqua
95%
v ≤ 2.6.2

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)

Issue TrackingThird Party Advisory
Source: [email protected]
https://github.com/bevacqua/insane/issues/19
ExploitThird Party Advisory
Source: [email protected]
https://securitylab.github.com/advisories/GHSL-2020-289-redos-insane/

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

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

CVSS

7.5HIGH[email protected]
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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