PYSEC-2026-538

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Import Source
https://github.com/pypa/advisory-database/blob/main/vulns/sglang/PYSEC-2026-538.yaml
JSON Data
https://api.osv.dev/v1/vulns/PYSEC-2026-538
Aliases
Published
2026-06-29T11:50:50.577356Z
Modified
2026-06-29T12:15:09.723768127Z
Severity
  • 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H CVSS Calculator
Summary
SGLang's multimodal generation runtime has an unauthenticated path traversal vulnerability
Details

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.

References

Affected packages

PyPI / sglang

Package

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0.5.5
Last affected
0.5.12

Affected versions

0.*
0.5.5
0.5.5.post1
0.5.5.post2
0.5.5.post3
0.5.6
0.5.6.post1
0.5.6.post2
0.5.7
0.5.8
0.5.8.post1
0.5.9
0.5.10rc0
0.5.10
0.5.10.post1
0.5.11
0.5.12

Database specific

source
"https://github.com/pypa/advisory-database/blob/main/vulns/sglang/PYSEC-2026-538.yaml"