stream-json: FlexAssembler string/RegExp path filters join the full key stack per container start, giving O(depth^2) CPU 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 0.0025, the 17th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 13:33 UTC First seen by agentprime
2. 31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-jj87-hc4r-jwfw
• OSV: GHSA-jj87-hc4r-jwfw
• github.com/uhop/stream-json/security/advisories/GHSA-jj87-hc4r-jwfw
• nvd.nist.gov/vuln/detail/CVE-2026-114129
• github.com/uhop/stream-json/commit/1929fd80495d45b47e8f8cb1d4e132f915aef012
• github.com/uhop/stream-json/commit/c06c9a3c02adef89543e26ecebb45837cb284512
• github.com/uhop/stream-json
• github.com/uhop/stream-json/releases/tag/3.7.0

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.