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CVE-2026-105668— Hex release-age cooldown is lifted package-wide when the locked release is retired

Quick assessment

Affected
hexpm hex
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.

hexpm hex 中保护机制失效漏洞 在 hexpm hex 中，包的所有者（或通过攻击者接管所有者账户）可以利用此漏洞，绕过版本发布的冷却期（release-age cooldown），使新发布的版本得以生效。 冷却机制（通过 配置项或环境变量 设置）在依赖解析阶段会阻止使用版本发布后未满规定年龄的软件包。然而，当被 锁定的某个包的发布版本被退役（retired）或存在安全警告时， 和 会为该软件包以及该锁定版本所依赖的所有其他包的每个版本解除冷却限制。这使得 能够跳过不安全的旧版本，从而解锁包。 退役发布版本

CVSS 7.1 · High

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 2

VendorProduct Version RangeStatus
hexpm hex 2.5.0< 2.5.2 affected
b4e665d46be8a5f81e8cbbe4c3a67058a19cf133< * affected
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I. Basic Information for CVE-2026-105668

Vulnerability Information
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Vulnerability Title
Hex release-age cooldown is lifted package-wide when the locked release is retired
Source: CVE Program / CVE List V5
Vulnerability Description
Protection Mechanism Failure vulnerability in hexpm hex allows the owner of a package, or an attacker who has taken over the owner's account, to get a newly published release past the release-age cooldown. The cooldown (cooldown config, HEX_COOLDOWN) withholds versions younger than the configured age during dependency resolution. When the release of a package locked in mix.lock is retired or has a security advisory, Hex.RemoteConverger.build_cooldown_bypass/3 and Hex.RemoteConverger.unsafe_lock_bypass/1 lift the cooldown for every version of that package and of every package the locked release depends on, so that mix deps.update can move off the unsafe release. Retiring a release needs the same package owner permission as publishing one. An attacker who publishes a malicious release can retire the currently locked release, and the next mix deps.update that unlocks the package selects the new release regardless of its age. Hex.Registry.Cooldown.versions/2 checks the bypass by package name alone, so the bypass also covers packages with the same name in other repositories. Cooldown configured through an organization dependency policy is not affected. This issue affects hex: from 2.5.0 before 2.5.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
保护机制失效
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
hexpm hex 2.5.0 ~ 2.5.2 cpe:2.3:a:hexpm:hex:*:*:*:*:*:*:*:*
hexpm hex b4e665d46be8a5f81e8cbbe4c3a67058a19cf133 ~ * cpe:2.3:a:hexpm:hex:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-105668

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III. Intelligence Information for CVE-2026-105668

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Vendor Advisories for CVE-2026-105668 (3)

Same Patch Batch · hexpm · 2026-10-12 · 7 CVEs total

CVE-2026-96612 7.5 HIGH Path traversal in Hex via unvalidated dependency app names
CVE-2026-105280 6.9 MEDIUM Hex writes unverified package tarballs to standard output in mix hex.package fetch
CVE-2026-103502 5.9 MEDIUM hex_core's default HTTP adapter doesn't verify TLS certificates on OTP 24 and 25
CVE-2026-103503 5.9 MEDIUM Hex trusts its bundled CA certificates when cacerts_path is set
CVE-2026-81856 2.3 LOW Terminal escape sequence injection in Hex via unneutralized server-supplied output
CVE-2026-96618 2.1 LOW Hex exhausts memory and disk on oversized or compressed responses from an untrusted mirror

IV. Related Vulnerabilities

Same product: hex
Same vendor: hexpm
Same weakness: CWE-693

V. Comments for CVE-2026-105668

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