by Kastro
Paper/Archive/CVE-2026-51882

CVE-2026-51882

mitre — The OpenAI-compatible file upload endpoint `/v1/files` in Langchain-Chatchat 0.3.0 is vulnerable to path traversal.

EPSS 0.5%public exploitCVSS 9.1
critical.is priorityof 100
46
CVSS 9.1 (ADP)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 43.3.433 × 208.7Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

The OpenAI-compatible file upload endpoint `/v1/files` in Langchain-Chatchat 0.3.0 is vulnerable to path traversal. An attacker can write files to arbitrary locations outside the `openai_files` directory by crafting malicious filenames.

Affected

ProductAffectedFixed inSource
n/an/a–CNA

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/chatchat-space/Langchain-Chatchat/issues/5468exploitgist.github.com/Ro1ME/f80ac458836b59adb9c6ceff3993f7f3