CVE-2026-21619
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or โ if you've already worked around this in production โ publish your fix to the community-verified tier.
โ Propose a mitigation on Community โ Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | sid | fixed | 3.27.0-1 |
| debian | trixie | affected | |
| debian | bookworm | affected | |
| debian | forky | fixed | 3.27.0-1 |
References
- https://github.com/hexpm/hex_core/security/advisories/GHSA-hx9w-f2w9-9g96
- https://cna.erlef.org/cves/CVE-2026-21619.html
- https://osv.dev/vulnerability/EEF-CVE-2026-21619
- https://github.com/hexpm/hex_core/commit/cdf726095bca85ad2549d146df1e831ae93c2b13
- https://github.com/hexpm/hex/commit/636739f3322514e9303ca335fb630696fcbb3c95
- https://github.com/erlang/rebar3/commit/1d4478f527e373de0b225951e53115450e0d9b9d
- https://security-tracker.debian.org/tracker/CVE-2026-21619
- https://hex.pm/packages/hex_core
- https://nvd.nist.gov/vuln/detail/CVE-2026-21619
- https://github.com/hexpm/hex_core
CWEs
CWE-400 CWE-502
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.