CVE-2026-105668 Affecting erlang-hex package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published17 Oct 2026
- disclosed12 Oct 2026
Introduced: 12 Oct 2026
NewCVE-2026-105668 (opens in a new tab)How to fix?
There is no fixed version for Echo:latest erlang-hex.
NVD Description
Note: Versions mentioned in the description apply only to the upstream erlang-hex package and not the erlang-hex package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
Protection Mechanism Failure vulnerability in hexpm hex allows the owner of a package, or an attacker who has taken over the owner's account, to get a newly published release past the release-age cooldown.
The cooldown (cooldown config, HEX_COOLDOWN) withholds versions younger than the configured age during dependency resolution. When the release of a package locked in mix.lock is retired or has a security advisory, Hex.RemoteConverger.build_cooldown_bypass/3 and Hex.RemoteConverger.unsafe_lock_bypass/1 lift the cooldown for every version of that package and of every package the locked release depends on, so that mix deps.update can move off the unsafe release. Retiring a release needs the same package owner permission as publishing one. An attacker who publishes a malicious release can retire the currently locked release, and the next mix deps.update that unlocks the package selects the new release regardless of its age. Hex.Registry.Cooldown.versions/2 checks the bypass by package name alone, so the bypass also covers packages with the same name in other repositories. Cooldown configured through an organization dependency policy is not affected.
This issue affects hex: from 2.5.0 before 2.5.2.
References
- https://advisory.echohq.com/cve/CVE-2026-105668
- https://cna.erlef.org/cves/CVE-2026-105668.html
- https://github.com/hexpm/hex/commit/1b6fddfeadd98ed26a143f60356efade0494e2ae
- https://github.com/hexpm/hex/commit/b4e665d46be8a5f81e8cbbe4c3a67058a19cf133
- https://github.com/hexpm/hex/commit/eed2bdf85320ae9e244629511c03f5f3f8c5d0b5
- https://github.com/hexpm/hex/security/advisories/GHSA-pqhp-5x9x-69h7
- https://osv.dev/vulnerability/EEF-CVE-2026-105668