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CVE-2026-82673— Path traversal in AshAdmin file uploads via unsanitized client filename

Quick assessment

Affected
ash-project ash_admin
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.

以下是对该漏洞描述的中文翻译： 路径限制不当（路径遍历）漏洞 ash-project 的 ash_admin 组件存在一个路径遍历（Path Traversal）漏洞，允许攻击者将自定义字节写入服务器上的任意路径。 在 中，目标路径通过 构建，并使用 进行写入。其中， 是浏览器提供的文件名，且未经过任何清洗（sanitization），而 也不会对 进行规范化处理。因此，一个名为 的上传文件可以逃逸出随机的临时目录，并写入 BEAM 用户有权限写入的任意位置。这可能导致任意文件写入，进而通过覆盖应用程序资源、配置文

CVSS 8.3 · High
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I. Basic Information for CVE-2026-82673

Vulnerability Information
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Vulnerability Title
Path traversal in AshAdmin file uploads via unsanitized client filename
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Limitation of a Pathname to a Restricted Directory (Path Traversal) vulnerability in ash-project ash_admin allows writing attacker-controlled bytes to arbitrary paths on the server. AshAdmin.Components.Resource.Form.consume_file_uploads/1 builds the destination as Path.join([tmp_dir, entry.client_name]) and writes it with File.cp!/2. entry.client_name is the browser-supplied filename and is not sanitized, and Path.join/1 does not normalize ... An upload named ../../../../var/www/app/priv/static/x.png therefore escapes the random temp directory and lands anywhere the BEAM user can write, enabling arbitrary file write and potentially remote code execution by overwriting application assets, configuration, or cron/ssh files. The only guard is an extension allowlist defaulting to :any that checks only the extension. The fix strips path components with Path.basename/1 before joining. This issue affects ash_admin: from 0.13.7 before 1.3.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
ash-project ash_admin 0.13.7 ~ 1.3.1 cpe:2.3:a:ash-project:ash_admin:*:*:*:*:*:*:*:*
ash-project ash_admin e8f496b6a064ad67dc1cd30433e5921d2192d254 ~ 4bb41cb697f3d9be58462d727aed75aba76efc82 cpe:2.3:a:ash-project:ash_admin:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-82673

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III. Intelligence Information for CVE-2026-82673

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Other References for CVE-2026-82673 (4)

Same Patch Batch · ash-project · 2026-08-31 · 13 CVEs total

CVE-2026-77956 10.0 CRITICAL EEx template evaluation of prompt content in AshAi enables remote code execution
CVE-2026-77850 8.4 HIGH Stored XSS in AshAdmin relationship typeahead via unescaped label_field content
CVE-2026-82722 8.3 HIGH AshAdmin LiveView events intern atoms from client input, exhausting the atom table (node D
CVE-2026-75757 8.3 HIGH AshAdmin cookie reader matches names by substring, enabling actor/session shadowing from a
CVE-2026-81315 7.4 HIGH MCP DNS-rebinding origin check in AshAi is bypassed by a spoofed X-Forwarded-Proto header
CVE-2026-75760 7.1 HIGH AshAi vectorize change leaks raw embedding-provider errors, including credentials, in a us
CVE-2026-82564 7.1 HIGH Identity tool filter in AshAi accepts operator maps, allowing update or destroy of unident
CVE-2026-82579 6.0 MEDIUM AshAi tool loop never terminates when all tool calls are filtered out, enabling denial of
CVE-2026-82580 5.3 MEDIUM AshAi echoes raw tool exception messages into the conversation, disclosing internal detail
CVE-2026-81853 2.3 LOW AshAdmin composite primary key decoding accepts arbitrary fields, enabling a secret-attrib
CVE-2026-81852 2.1 LOW AshAdmin ships a hardcoded CSP nonce, allowing nonce-based CSP bypass
CVE-2026-82681 2.0 LOW Query-parameter injection in AshAdmin row-action links via unencoded string primary keys

IV. Related Vulnerabilities

Same product: ash_admin
Same vendor: ash-project
Same weakness: CWE-22

V. Comments for CVE-2026-82673

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