SGLang's multimodal generation runtime has an unauthenticated path traversal vulnerability
SGLang's multimodal generation runtime is vulnerable to an unauthenticated path traversal vulnerability, allowing an attacker to write arbitrary files anywhere the server process has write access, by including ../ sequences in the upload filename when sent to specific endpoints.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | sglang | >= 0.5.5, <= 0.5.12 | no fix |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H- Weakness (CWE)
CWE-35- Platform
- Python (PyPI)
- Package
sglang- Disclosed
- 18.05.2026
- Updated
- 11.10.2026 13:17
Sources and licenses
OSV / GitHub Advisory Database - GHSA-qwrp-wghp-94q2 - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2026-538 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: sglang
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 10
- First → latest
- 09.2025 06.2026
- Without a fix
- 6
- Exploited in attacks
- 0
Severity breakdown
- Critical 5
- High 1
- Medium 2
- Low 2
Disclosures per year
- 2025: 1
- 2026: 9
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SGLang's multimodal generation runtime has an unauthenticated path traversal vulnerability this entry
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