What’s Vulnerable › Vulnerabilities

CVE-2023-4241: lol-html panics on certain HTML inputs

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-08-16 · updated 2026-06-17
Weakness: CWE-20

Description

lol-html can cause panics on certain HTML inputs. Anyone processing arbitrary 3rd party HTML with the library is affected.

Affected products

Cloudflare lol-html: before 1.1.1 — fixed in 1.1.1

How to fix

Upgrade to a fixed version: Cloudflare lol-html 1.1.1. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2023-4241 or the next vulnerability affects your stack