Apollo Router Unnamed "Subscription" operation results in Denial-of-Service

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 0.0080, the 56th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 15:17 UTC First seen by agentprime
2. 31 Oct 2026, 15:17 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-w8vq-3hf9-xppx
• OSV: GHSA-w8vq-3hf9-xppx
• github.com/apollographql/router/security/advisories/GHSA-w8vq-3hf9-xppx
• nvd.nist.gov/vuln/detail/CVE-2023-41317
• github.com/apollographql/router/commit/b295c103dd86c57c848397d32e8094edfa8502aa
• github.com/apollographql/router
• github.com/apollographql/router/releases/tag/v1.29.1

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.