CVE-2025-6855
CVE-2025-6855 is a medium-severity vulnerability in Chatchat-space Langchain-chatchat with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.
Key facts
- Severity: Medium (CVSS 3.x base score 5.5)
- CVSS v2: 5.2
- CVSS v4: 2.0
- EPSS exploit prediction: 1% (42nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-19478
- Weakness: CWE-22
- Affected product: Chatchat-space Langchain-chatchat
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2025-6855?
- 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.
- How severe is CVE-2025-6855?
- CVE-2025-6855 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
- Is CVE-2025-6855 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-6855?
- CVE-2025-6855 affects Chatchat-space Langchain-chatchat. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-6855?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-6855 have an EU (EUVD) identifier?
- Yes. CVE-2025-6855 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19478.
- When was CVE-2025-6855 published?
- CVE-2025-6855 was published on 2025-06-29 and last updated on 2026-06-17.
References
- https://github.com/chatchat-space/Langchain-Chatchat/issues/5354
- https://vuldb.com/?ctiid.314327
- https://vuldb.com/?id.314327
- https://vuldb.com/?submit.601162
Affected products (1)
- cpe:2.3:a:chatchat-space:langchain-chatchat:*:*:*:*:*:*:*:*
More vulnerabilities in Chatchat-space Langchain-chatchat
- CVE-2025-6853 — Medium (CVSS 6.3): A vulnerability classified as critical has been found in chatchat-space Langchain-Chatchat up to 0.3.1. This affects…
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