Unrestricted file upload in PuMuKIT lets attackers write files to the server
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Low · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-434.
Summary
PuMuKIT, a web application, has an unrestricted file upload flaw (CWE-434). An unauthenticated user can upload files of any type to the server, to any path where the web server user has write permissions. The flaw could also allow them to delete files.
Written with Claude Haiku 5.5 from the sources below · 2026-11-04
Description from the CNA
Unrestricted Upload of File with Dangerous Type vulnerability in the PuMuKIT application allows a unauthenticated user to upload any type of file to the server, and to any path where the web server user has write permissions. This could also allow them to delete files.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
The sources list no fixed version for PuMuKIT.
Written with Claude Haiku 5.5 from the sources below · 2026-11-04
Timeline
- 2026-10-27 Threatist record created from CVE-2026-4337
- 2026-10-27 Alias added: GHSA-57jc-x74j-f4w4
- 2026-10-28 Priority changed: MEDIUM → LOW
- 2026-11-04 CISA SSVC decision points changed
- 2026-11-04 Priority changed: LOW → MEDIUM
References
Sources
- CVE-2026-4337 · CVE Program
- CVE-2026-4337 · NVD
- FIRST EPSS
- GHSA-57jc-x74j-f4w4 · GitHub Advisory Database · CC BY 4.0
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