Unrestricted file upload in GouGuOA chunk upload API
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass, Code execution
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-284 and CWE-434.
Summary
GouGuOA up to 6.1.2 is affected. The chunkUpload function in app/disk/controller/Api.php does not restrict the file_extension argument, which allows unrestricted upload (CWE-434). A remote attacker with low privileges can exploit this without user interaction. A public exploit has been released and may be used for attacks.
Written with Claude Haiku 5.5 from the sources below · 2026-11-02
Description from the CNA
A security flaw has been discovered in GouGuOA up to 6.1.2. The impacted element is the function chunkUpload of the file app/disk/controller/Api.php. The manipulation of the argument file_extension results in unrestricted upload. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | GouGuOA | 6.1.0; 6.1.1; 6.1.2 | — | No fix listed | CNA |
- GouGuOA Vendor— Affected 6.1.0; 6.1.1; 6.1.2 Fixed in — No fix listed CNA
CPE names CNA · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:gouguoa:gouguoa:*:*:*:*:*:*:*:* | — | — | — |
- cpe:2.3:a:gouguoa:gouguoa:*:*:*:*:*:*:*:* Versions — — ·—
Remediation
The sources list no fixed version for GouGuOA.
Written with Claude Haiku 5.5 from the sources below · 2026-11-02
Timeline
- 2026-10-26 Threatist record created from CVE-2026-116113
- 2026-10-27 Alias added: GHSA-jxj3-4fgr-8483
- 2026-11-02 CISA SSVC decision points changed
- 2026-11-02 Priority changed: LOW → MEDIUM
References
Sources
- CVE-2026-116113 · CVE Program
- CVE-2026-116113 · NVD
- FIRST EPSS
- GHSA-jxj3-4fgr-8483 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences