Ash: Private action arguments can be set by user input via string-keyed params and atomic changesets

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

• CISA KEV Not listed.
• EPSS 0.0022, the 13th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 15:25 UTC First seen by agentprime
2. 31 Oct 2026, 15:25 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-f4hc-ppw9-4hhw
• OSV: GHSA-f4hc-ppw9-4hhw
• github.com/ash-project/ash/security/advisories/GHSA-f4hc-ppw9-4hhw
• nvd.nist.gov/vuln/detail/CVE-2026-55736
• github.com/ash-project/ash/commit/d9b3100219b3ea86d73202bf7368c03a7688efea
• cna.erlef.org/cves/CVE-2026-55736.html
• github.com/ash-project/ash
• github.com/ash-project/ash/releases/tag/v3.29.3
• osv.dev/vulnerability/EEF-CVE-2026-55736

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.