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Advisory record · PKSA-n87g-t5cn-m1yq

CVE-2026-118517: HtmlSanitizer allowLinkHosts() / allowMediaHosts() Bypass via URLs Without a Well-Formed Authority: Incomplete Fix for CVE-2026-45066

CVSS 2.3 Low

Published by Packagist at 4 Nov 2026, 11:23 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
symfony/html-sanitizerPackagist>=6.1.0, <6.2.0 || >=6.2.0, <6.3.0 || >=6.3.0, <6.4.0 || >=6.4.0, <6.4.50 || >=7.0.0, <7.1.0 || >=7.1.0, <7.2.0 || >=7.2.0, <7.3.0 || >=7.3.0, <7.4.0 || >=7.4.0, <7.4.23 || >=8.0.0, <8.1.0 || >=8.1.0, <8.1.116.2.0, 6.3.0, 6.4.0, 6.4.50, 7.1.0, 7.2.0, 7.3.0, 7.4.0, 7.4.23, 8.1.0, 8.1.11
Identifiers
PKSA-n87g-t5cn-m1yq · CVE-2026-118517
Weakness (CWE)
CWE-184 · CWE-436
Tags
Published
4 Nov 2026
Updated
4 Nov 2026

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
2.3 Low 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CNA (Checkmarx)
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 4 Nov 2026, 11:23 UTC Confirmed by Packagist
  2. 4 Nov 2026, 19:23 UTC First seen by agentprime
  3. 5 Nov 2026, 16:26 UTC Confirmed by the CVE List
  4. 5 Nov 2026, 17:17 UTC Confirmed by NVD

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.