CVE record · CVE-2026-59247

Insufficient verification of Hex package metadata in Gleam

CVSS 7.6 HighEPSS 0.0018 · 7th percentile

Published by the CVE Program (CNA: EEF) at 29 Jul 2026, 14:24 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
gleam-lang	gleam Package name: gleam.run/gleam https://gleam.run pkg:software-id/gleam.run/gleam	affected 0.18.0 to before 1.18.0 semver Other versions: unaffected
gleam-lang	gleam Package name: gleam-lang/gleam https://github.com pkg:github/gleam-lang/gleam	affected 0.18.0 to before 1.18.0 semver affected 8447b78cc844ff4aec44eea23dbd68d1fea11f11 to before c9c0d48c123c8abae6db8dd61b25ccb427ed3d35 git Other versions: unaffected
gleam-lang	gleam Package name: gleam-lang/gleam https://ghcr.io pkg:oci/gleam?repository_url=ghcr.io/gleam-lang	affected v0.18.0-elixir to before v1.18.0-elixir other affected v0.18.0-elixir-slim to before v1.18.0-elixir-slim other affected v0.18.0-elixir-alpine to before v1.18.0-elixir-alpine other affected v0.18.0-erlang to before v1.18.0-erlang other affected v0.18.0-erlang-slim to before v1.18.0-erlang-slim other affected v0.18.0-erlang-alpine to before v1.18.0-erlang-alpine other affected v0.18.0-node to before v1.18.0-node other affected v0.18.0-node-slim to before v1.18.0-node-slim other affected v0.18.0-node-alpine to before v1.18.0-node-alpine other affected v1.6.0-scratch to before v1.18.0-scratch other Other versions: unaffected

Identifiers: CVE-2026-59247
CNA: EEF
Weakness (CWE): CWE-345
Tags: gleam
CWE-345
Published: 29 Jul 2026
Updated: 8 Sept 2026

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
7.6	High	4.0	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N	CNA (EEF)

CISA KEV Not listed.
EPSS 0.0018, the 7th percentile, on 9 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 29 Jul 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/gleam-lang/gleam/security/advisories/GHSA-4vvc-458m-r82g vendor-advisoryrelated
cna.erlef.org/cves/CVE-2026-59247.html related
osv.dev/vulnerability/EEF-CVE-2026-59247 related
github.com/gleam-lang/gleam/commit/c9c0d48c123c8abae6db8dd61b25ccb427ed3d35 patch
github.com/hexpm/specifications/blob/main/registry-v2.md related

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.