CVE-2026-21619

Unsafe Deserialization of Erlang Terms in hex_core

Published: Feb 27, 2026Updated: Mar 2, 2026 Sources: CVE List NVD GHSACWE-400

N/ACVSS

NVD MITRE

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.

No summary for this CVE yet.

Weaknesses

CWE-400 CWE-502

Affected Products

hexpm

oss-projectaka hex.pm, hex

hex_coreSaaS

OSS Libraries / generic-library

hexSaaS

OSS Libraries / generic-library

erlang

oss-projectaka otp, erlang/otp, erlang/ssh

rebar3On-premDev Tool

DevTools & CI / build-test-tools

Hex

package-ecosystem

hex_coreLibrary

OSS Libraries / hex

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

4 techniques

Execution

Impact

Initial Access

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References

https://github.com/erlang/rebar3/commit/1d4478f527e373de0b225951e53115450e0d9b9d

github.com

https://github.com/hexpm/hex/commit/636739f3322514e9303ca335fb630696fcbb3c95

github.com

https://github.com/hexpm/hex_core/commit/cdf726095bca85ad2549d146df1e831ae93c2b13

github.com

and 5 more references View all →

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