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CVE-2026-21619— Unsafe Deserialization of Erlang Terms in hex_core

Quick assessment

Affected
hexpm hex_core
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

hex_core是Hex开源的一个十六进制实现库 hex_core 0.12.1之前版本、hex 2.3.2之前版本和rebar3 3.27.0之前版本存在安全漏洞，该漏洞源于不受控资源消耗和不可信数据反序列化，可能导致对象注入和过度分配。

AI Predicted 7.5 Difficulty: Easy EPSS 0.58% · P45

Affected Version Matrix 6

VendorProduct Version RangeStatus
erlang rebar3 209c02ec57c2cc3207ee0174c3af3675b8dc8f79< 1d4478f527e373de0b225951e53115450e0d9b9d affected
3.9.1< 3.27.0 affected
hexpm hex 314546ac432229518714cc8e3336e916b9da6305< 636739f3322514e9303ca335fb630696fcbb3c95 affected
2.3.0< 2.3.2 affected
hexpm hex_core eb327f8edfe45507351e38cc0805aa12fa647f0b< cdf726095bca85ad2549d146df1e831ae93c2b13 affected
0.1.0< 0.12.1 affected
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I. Basic Information for CVE-2026-21619

Vulnerability Information
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Vulnerability Title
Unsafe Deserialization of Erlang Terms in hex_core
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
hex_core 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
hex_core是Hex开源的一个十六进制实现库 hex_core 0.12.1之前版本、hex 2.3.2之前版本和rebar3 3.27.0之前版本存在安全漏洞，该漏洞源于不受控资源消耗和不可信数据反序列化，可能导致对象注入和过度分配。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
hexpm hex_core eb327f8edfe45507351e38cc0805aa12fa647f0b ~ cdf726095bca85ad2549d146df1e831ae93c2b13 cpe:2.3:a:hexpm:hex_core:*:*:*:*:*:*:*:*
hexpm hex_core 0.1.0 ~ 0.12.1 cpe:2.3:a:hexpm:hex_core:*:*:*:*:*:*:*:*
hexpm hex 314546ac432229518714cc8e3336e916b9da6305 ~ 636739f3322514e9303ca335fb630696fcbb3c95 cpe:2.3:a:hexpm:hex:*:*:*:*:*:*:*:*
hexpm hex 2.3.0 ~ 2.3.2 cpe:2.3:a:hexpm:hex:*:*:*:*:*:*:*:*
erlang rebar3 209c02ec57c2cc3207ee0174c3af3675b8dc8f79 ~ 1d4478f527e373de0b225951e53115450e0d9b9d cpe:2.3:a:erlang:rebar3:*:*:*:*:*:*:*:*
erlang rebar3 3.9.1 ~ 3.27.0 cpe:2.3:a:erlang:rebar3:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-21619

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-21619

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Vendor Advisories for CVE-2026-21619 (3)

IV. Related Vulnerabilities

Same vendor: hexpm
Same weakness: CWE-400

V. Comments for CVE-2026-21619

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