hex_core decompresses registry and Erlang term API responses without size limits

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 0.0045, the 39th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 15:25 UTC First seen by agentprime
2. 31 Oct 2026, 15:25 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-7c4r-cgf9-9jmq
• OSV: GHSA-7c4r-cgf9-9jmq
• github.com/hexpm/hex_core/security/advisories/GHSA-7c4r-cgf9-9jmq
• cna.erlef.org/cves/CVE-2026-105274.html
• github.com/erlang/rebar3/commit/209c02ec57c2cc3207ee0174c3af3675b8dc8f79
• github.com/erlang/rebar3/commit/360838a22f5b3a88c0358207f2923059bcbb3afb
• github.com/hexpm/hex_core/commit/fbb6d9de472e5edb8d6fb6b32a91cb266137892e
• github.com/hexpm/hex_core/commit/ebe25d110717f6a3addba5232cd4a7dc1c76b628
• github.com/hexpm/hex/commit/671f695ac548ed01f5828c2a739ecaa942b21007
• github.com/hexpm/hex/commit/d8b60eee97abb119d525306f048969a217d793a5
• hex.pm/packages/hex_core

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.