GHSA-hx9w-f2w9-9g96

Source

https://github.com/advisories/GHSA-hx9w-f2w9-9g96

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-hx9w-f2w9-9g96/GHSA-hx9w-f2w9-9g96.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-hx9w-f2w9-9g96

Aliases

Published

2026-03-01T01:25:35Z

Modified

2026-04-06T23:34:56Z

Severity

2.0 (Low) CVSS_V4 - 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 CVSS Calculator

Summary

hex_core has Unsafe Deserialization of Erlang Terms

Details

Impact

The Hex client (hex_core) deserializes Erlang terms received from the Hex API using binary_to_term/1 without sufficient restrictions.

If an attacker can control the HTTP response body returned by the Hex API, this allows denial-of-service attacks such as atom table exhaustion, leading to a VM crash. No released versions are known to allow remote code execution.

Patches

Workarounds

Ensure that the Hex API URL (HEX_API_URL) points only to trusted endpoints. There is no client-side workaround that fully mitigates this issue without applying the patch.

Resources

hex_core Module: https://github.com/hexpm/hex_core/blob/main/src/hex_api.erl
Hex Vendored Module: https://github.com/hexpm/hex/blob/main/src/mix_hex_api.erl
Rebar3 Vendored Module: https://github.com/erlang/rebar3/blob/main/apps/rebar/src/vendored/r3_hex_api.erl
hex_core Patch: https://github.com/hexpm/hex_core/commit/cdf726095bca85ad2549d146df1e831ae93c2b13
Hex Vendored Patch: https://github.com/hexpm/hex/commit/636739f3322514e9303ca335fb630696fcbb3c95
Rebar3 Vendored Patch: https://github.com/erlang/rebar3/commit/1d4478f527e373de0b225951e53115450e0d9b9d

Database specific

{
    "cwe_ids":  [
        "CWE-400"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-03-01T01:25:35Z",
    "nvd_published_at":  "2026-02-27T18:16:11Z",
    "severity":  "LOW"
}

References

Affected packages

Hex / hex_core

Package

Name: hex_core
Purl: pkg:hex/hex_core

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

0.12.1

Affected versions

0.*

0.1.0

0.1.1

0.2.0

0.2.1

0.3.0

0.4.0

0.5.0

0.5.1

0.6.0

0.6.1

0.6.2

0.6.3

0.6.4

0.6.5

0.6.6

0.6.7

0.6.8

0.6.9

0.6.10

0.7.0

0.7.1

0.8.0

0.8.1

0.8.2

0.8.3

0.8.4

0.9.0

0.10.0

0.10.1

0.10.2

0.10.3

0.11.0

0.12.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-hx9w-f2w9-9g96/GHSA-hx9w-f2w9-9g96.json"