CVE-2025-6855 json
chatchat-space Langchain-Chatchat file path traversal
published 2025-06-29 16 mo ago modified 2026-07-07 4 mo ago also GHSA-f823-phmg-x5fr , PYSEC-2026-1512 , EUVD-2025-19478
- cvss
- 5.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
Summary
A vulnerability, which was classified as critical, has been found in chatchat-space Langchain-Chatchat up to 0.3.1. This issue affects some unknown processing of the file /v1/file. The manipulation of the argument flag leads to path traversal. The exploit has been disclosed to the public and may be used.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 16 mo ago
Exploit prediction
0.60% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/chatchat-space/Langchain-Chatchat/issues/5354 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.1 | CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P |
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R |
| CNA | 3.0 | 5.5 | CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R |
| CNA | 2.0 | 5.2 | AV:A/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR |
| CNA | 4.0 | 2.0 | CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CNA | 2.0 | 5.2 | AV:A/AC:L/Au:S/C:P/I:P/A:P |
| OSV | 3.1 | 5.5 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
| GitHub | 3.1 | 5.5 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | langchain-chatchat | <=0.3.1 |
no fix listed |
Affected products
- chatchat-space Langchain-Chatchat
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/chatchat-space/Langchain-Chatchat/issues/5354
exploit, issue-tracking, web, vendor-advisory
-
vuldb.com
/?id.314327
vdb-entry, technical-description, web, third-party-advisory
-
vuldb.com
/?ctiid.314327
signature, permissions-required, web, vdb-entry
-
vuldb.com
/?submit.601162
third-party-advisory, web, vdb-entry
-
nvd.nist.gov
/vuln/detail/CVE-2025-6855
advisory
-
github.com
/chatchat-space/Langchain-Chatchat
package
-
pypi.org
/project/langchain-chatchat
package
-
github.com
/advisories/GHSA-f823-phmg-x5fr
advisory
Sources
- CVE List CVE-2025-6855
- GitHub Advisory GHSA-f823-phmg-x5fr
- NVD CVE-2025-6855
- OSV PYSEC-2026-1512
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.