CVE-2026-21619

Uncontrolled Resource Consumption, Deserialization of Untrusted Data vulnerability in hexpm hex_core (hex_api modules), hexpm hex (mix_hex_api modules), erlang rebar3 (r3_hex_api modules) allows Object Injection, Excessive Allocation. This vulnerability is associated with program files src/hex_api.erl, src/mix_hex_api.erl, apps/rebar/src/vendored/r3_hex_api.erl and program routines hex_core:request/4, mix_hex_api:request/4, r3_hex_api:request/4. This issue affects hex_core: from 0.1.0 before 0.12.1; hex: from 2.3.0 before 2.3.2; rebar3: from 3.9.1 before 3.27.0.

The following products are affected by CVE-2026-21619 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-21619.

URL	Resource
https://cna.erlef.org/cves/CVE-2026-21619.html
https://github.com/erlang/rebar3/commit/1d4478f527e373de0b225951e53115450e0d9b9d
https://github.com/hexpm/hex/commit/636739f3322514e9303ca335fb630696fcbb3c95
https://github.com/hexpm/hex_core/commit/cdf726095bca85ad2549d146df1e831ae93c2b13
https://github.com/hexpm/hex_core/security/advisories/GHSA-hx9w-f2w9-9g96
https://osv.dev/vulnerability/EEF-CVE-2026-21619