CVSS 4.0
2.0 lowCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NCVE-2026-21619
Low (2.0). EPSS 0.6% chance of exploitation in the next 30 days.
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
CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 50% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-400, CWE-502
- Published
- Modified
- Record from
- the NVD, synced
Affected
- erlang:rebar3
- hex:hex
- hex:hex_core
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