CVE record · CVE-2026-43965

Path Traversal in build/packages/packages.toml Allows Arbitrary Directory Deletion

CVSS 5.6 MediumEPSS 0.0023 · 13th percentile

Published by the CVE Program (CNA: EEF) at 2 Jun 2026, 13:41 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	Gleam Package name: gleam pkg:software-id/gleam.run/gleam	affected 0.18.0-rc1 to before 1.17.0 semver Other versions: unaffected
Gleam	Gleam Package name: gleam-lang/gleam https://github.com pkg:github/gleam-lang/gleam	affected 0.18.0-rc1 to before 1.17.0 semver affected ed7aec0484f10d60978b63788c8a6497590855ab to before 690ca069817bee5f77a28fc3e360627c1da19291 git Other versions: unaffected
Gleam	Gleam Package name: gleam-lang/gleam https://ghcr.io pkg:oci/gleam?repository_url=ghcr.io/gleam-lang	affected v0.18.0-rc1-elixir to before v1.17.0-elixir other affected v0.18.0-rc1-erlang to before v1.17.0-erlang other affected v0.18.0-rc1-node to before v1.17.0-node other affected v0.18.0-rc1-node-slim to before v1.17.0-node-slim other affected v0.18.0-rc1-elixir-slim to before v1.17.0-elixir-slim other affected v0.18.0-rc1-erlang-slim to before v1.17.0-erlang-slim other affected v0.18.0-rc1-erlang-alpine to before v1.17.0-erlang-alpine other affected v0.18.0-rc1-elixir-alpine to before v1.17.0-elixir-alpine other affected v0.18.0-rc1-node-alpine to before v1.17.0-node-alpine other affected v0.18.0-rc1-scratch to before v1.17.0-scratch other Other versions: unaffected

Identifiers: CVE-2026-43965
CNA: EEF
Weakness (CWE): CWE-22
Tags: Gleam
Path traversal
Published: 2 Jun 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
5.6	Medium	4.0	CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	CNA (EEF)

CISA KEV Not listed.
EPSS 0.0023, the 13th 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 2 Jun 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/gleam-lang/gleam/security/advisories/GHSA-jqvf-f6p2-wrv3 vendor-advisoryrelated
cna.erlef.org/cves/CVE-2026-43965.html related
osv.dev/vulnerability/EEF-CVE-2026-43965 related
github.com/gleam-lang/gleam/commit/690ca069817bee5f77a28fc3e360627c1da19291 patch

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.