CVE-2026-21619

EUVD-2026-9037

27.02.2026, 18:16

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Affected Products (NVD)

Vendor	Product	Version
erlang	rebar3	3.9.1 ≤ 𝑥 < 3.27.0
hex	hex	2.3.0 ≤ 𝑥 < 2.3.2
hex	hex_core	0.1.0 ≤ 𝑥 < 0.12.1

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-400 - Uncontrolled Resource Consumption
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

References

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