CVE-2020-26303

8.7 highEPSS 0.5%

High (8.7) in bevacqua insane. EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

8.7 high

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Green

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 45% of CVEs (scores of 2026-10-31)
CWE: CWE-1333
Published: 2024-10-26
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

bevacqua:insane

Packages (OSV)

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-w455-mfq9-hf74	npm	insane	<=2.6.2	no fix published

References

https://github.com/bevacqua/insane/issues/19
https://securitylab.github.com/advisories/GHSL-2020-289-redos-insane/

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