Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Erlang | Rebar3 | >= 3.9.1, < 3.27.0 |
| Hex | Hex | >= 2.3.0, < 2.3.2 |
| Hex | Hex Core | >= 0.1.0, < 0.12.1 |
Related Weaknesses (CWE)
References
- https://cna.erlef.org/cves/CVE-2026-21619.html
- https://github.com/erlang/rebar3/commit/1d4478f527e373de0b225951e53115450e0d9b9dPatch
- https://github.com/hexpm/hex/commit/636739f3322514e9303ca335fb630696fcbb3c95Patch
- https://github.com/hexpm/hex_core/commit/cdf726095bca85ad2549d146df1e831ae93c2b1Patch
- https://github.com/hexpm/hex_core/security/advisories/GHSA-hx9w-f2w9-9g96MitigationVendor Advisory
- https://osv.dev/vulnerability/EEF-CVE-2026-21619
FAQ
What is CVE-2026-21619?
CVE-2026-21619 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 Objec...
How severe is CVE-2026-21619?
CVE-2026-21619 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-21619?
Check the references section above for vendor advisories and patch information. Affected products include: Erlang Rebar3, Hex Hex, Hex Hex Core.