Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · PKSA-y8c5-1b7f-r1gj

CVE-2026-118516: Host Placeholders Can Match the Start of the Path in Compiled URL Matchers, Bypassing Path-Based Access Control

CVSS 6.3 MediumEPSS 0.0045 · 38th percentile

Published by Packagist at 4 Nov 2026, 10:45 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
symfony/routingPackagist>=4.1.0, <4.2.0 || >=4.2.0, <4.3.0 || >=4.3.0, <4.4.0 || >=4.4.0, <5.0.0 || >=5.0.0, <5.1.0 || >=5.1.0, <5.2.0 || >=5.2.0, <5.3.0 || >=5.3.0, <5.4.0 || >=5.4.0, <5.4.56 || >=6.0.0, <6.1.0 || >=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, <8.1.114.2.0, 4.3.0, 4.4.0, 5.0.0, 5.1.0, 5.2.0, 5.3.0, 5.4.0, 5.4.56, 6.1.0, 6.2.0, 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-y8c5-1b7f-r1gj · CVE-2026-118516
Weakness (CWE)
CWE-436 · CWE-863
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
6.3 Medium 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CNA (Checkmarx)
  • CISA KEV Not listed.
  • EPSS 0.0045, the 38th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 4 Nov 2026, 10:45 UTC Confirmed by Packagist
  2. 4 Nov 2026, 19:23 UTC First seen by agentprime

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.