CVE-2026-21619
February 27, 2026
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.
Affected Packages
https://github.com/hexpm/hex.git (GITHUB):
Affected version(s) >=v2.3.0 <v2.3.2Fix Suggestion:
Update to version v2.3.2https://github.com/erlang/rebar3.git (GITHUB):
Affected version(s) >=3.9.1 <3.27.0Fix Suggestion:
Update to version 3.27.0https://github.com/hexpm/hex_core.git (GITHUB):
Affected version(s) >=v0.1.0 <v0.12.1Fix Suggestion:
Update to version v0.12.1hex_core (HEX):
Affected version(s) >=0.1.0 <0.12.1Fix Suggestion:
Update to version 0.12.1hex_core (HEX):
Affected version(s) >=0.1.0 <0.12.1Fix Suggestion:
Update to version 0.12.1Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
2
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
ACTIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
EPSS
Base Score:
0.02
