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CVE-2026-93336— Missing authorization in the unit resources download route in Juju controllers

Quick assessment

Affected
Canonical Juju
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.

在 Canonical Juju 4.0 至 4.0.15 版本中，单元资源下载路由缺少授权验证，导致已认证的控制器主体（如单元代理或仅拥有登录权限的用户）能够通过构造请求并指定任意单元名称，读取任何模型中任何应用程序的 charms 资源，其中包括容器注册表凭据。

CVSS 7.1 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
Canonical Juju 4.0< 4.0.16 affected
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I. Basic Information for CVE-2026-93336

Vulnerability Information
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Vulnerability Title
Missing authorization in the unit resources download route in Juju controllers
Source: CVE Program / CVE List V5
Vulnerability Description
Missing authorization in the unit resources download route in Canonical Juju 4.0 through 4.0.15 allows a controller-authenticated principal (a unit agent, or a user with only login permission) to read any application's charm resource in any model,  including container-registry credentials, via a crafted request naming an arbitrary unit.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Canonical Juju 4.0 ~ 4.0.16 -

II. Public POCs for CVE-2026-93336

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III. Intelligence Information for CVE-2026-93336

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Patches & Fixes for CVE-2026-93336 (1)

Vendor Advisories for CVE-2026-93336 (1)

IV. Related Vulnerabilities

Same product: Juju
Same vendor: Canonical
Same weakness: CWE-862

V. Comments for CVE-2026-93336

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