Is CVE-2026-21619 actively exploited?

No active exploitation of CVE-2026-21619 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-21619 be exploited remotely?

Yes. CVE-2026-21619 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-21619?

CVE-2026-21619 has a CVSS score of 2.0 (LOW).

HOME VULNERABILITIESCVE-2026-21619

LOW

CVE-2026-21619

CWE-400Published: February 27, 2026· Updated: Mar 2, 2026

2.0

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:3.4th

Official 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.

NVD Source

Technical Analysis

CVE-2026-21619 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.Low

User InteractionA

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X