CVE-2026-115274: elixir-lang elixir

Unbounded integer parsing in JSON.decode/1 enables CPU and memory exhaustion denial of service in Elixir

CVSS 6.9 MediumEPSS 0.0050 · 42nd percentile

Published by the CVE Program (CNA: EEF) at 30 Oct 2026, 08:57 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
elixir-lang	elixir Package name: elixir pkg:otp/elixir?repository_url=https:%2F%2Fgithub.com%2Felixir-lang%2Felixir&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Felixir-lang%2Felixir.git	affected 1.18.0-rc.0 to before 1.18.6 semver affected 1.19.0-rc.0 to before 1.19.7 semver affected 1.20.0-rc.0 to before 1.20.5 semver Other versions: unaffected
elixir-lang	elixir Package name: elixir-lang/elixir https://github.com pkg:github/elixir-lang/elixir	affected 793c1147210388587defb649f25f293ffbfa6b1b to before * git Other versions: unaffected

Identifiers

CVE-2026-115274

CNA

EEF

Weakness (CWE)

CWE-1284

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.9	Medium	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	CNA (EEF)

CISA KEV Not listed.
EPSS 0.0050, the 42nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 30 Oct 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.