AstrBot: File upload vulnerability in the function post_file of the file astrbot/dashboard/routes/chat.py

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

2.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P · score source

EPSS

• CVE-2026-8754: 0.36% estimated exploitation activity in the next 30 days; percentile 29.61 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

A vulnerability was detected in AstrBotDevs AstrBot up to 4.23.5. Impacted is the function postfile of the file astrbot/dashboard/routes/chat.py of the component File Upload Handler. The manipulation of the argument filename results in path traversal. It is possible to launch the attack remotely. The exploit is now public and may be used. Upgrading to version 4.23.6 is recommended to address this issue. The patch is identified as aaec41e5054569ceaa1113593a34da7568e2d211. You should upgrade the affected component.

Published by the source

17 May 2026, 15:31 UTC

Last modified by the source

13 Jul 2026, 16:43 UTC

Source last checked

26 Oct 2026, 13:41 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-f63h-wc26-pmvc

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-f63h-wc26-pmvc

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# Patch Next advisory brief: CVE-2026-8754

Advisory: AstrBot: File upload vulnerability in the function post_file of the file astrbot/dashboard/routes/chat.py
IDs: CVE-2026-8754, GHSA-f63h-wc26-pmvc
Record: https://patchnext.com/advisories/cve-2026-8754 (revision 3, source checked 26 Oct 2026, 13:41 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 2.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: astrbot 4.23.6. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI astrbot: affected < 4.23.6; fixed in 4.23.6

## Suggested inspection (read-only)
- `python -m pip show astrbot`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on astrbot.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-f63h-wc26-pmvc (OSV record GHSA-f63h-wc26-pmvc lists affected ranges: PyPI astrbot >=0 <4.23.6 (fixed))
- Verified: https://github.com/advisories/GHSA-f63h-wc26-pmvc (GitHub-reviewed advisory GHSA-f63h-wc26-pmvc lists affected ranges: PyPI astrbot >=0 <4.23.6)

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