CVE-2026-21619 – Unsafe Deserialization of Erlang Terms in hex_core

CVE ID : CVE-2026-21619

Published : Feb. 27, 2026, 6:16 p.m. | 56 minutes ago

Description : 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.

Severity: 2.0 | LOW

Visit the link for more details, such as CVSS details, affected products, timeline, and more…