chatchat-space Langchain-Chatchat Vision Chat Paste Image dialogue.py PIL.Image.tobytes weak hash

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-7845
StatePUBLISHED
AssignerVulDB
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-05 16:16:19 UTC
Updated2026-05-05 20:16:41 UTC
DescriptionA flaw has been found in chatchat-space Langchain-Chatchat up to 0.3.1.3. This issue affects the function PIL.Image.tobytes of the file libs/chatchat-server/chatchat/webui_pages/dialogue/dialogue.py of the component Vision Chat Paste Image Handler. This manipulation of the argument paste_image.image_data causes use of weak hash. The attacker needs to be present on the local network. The attack is considered to have high complexity. The exploitability is assessed as difficult. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Risk And Classification

Primary CVSS: v4.0 1.2 LOW from [email protected]

CVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/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

Problem Types: CWE-327 | CWE-328 | CWE-328 Use of Weak Hash | CWE-327 Risky Cryptographic Algorithm

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary1.2LOWCVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/C...
4.0CNADECLARED2.1LOWCVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
3.1[email protected]Secondary2.6LOWCVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED2.6LOWCVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
3.0CNADECLARED2.6LOWCVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
2.0[email protected]Secondary1.4AV:A/AC:H/Au:S/C:N/I:P/A:N
2.0CNADECLARED1.4AV:A/AC:H/Au:S/C:N/I:P/A:N/E:POC/RL:ND/RC:UR

CVSS v4.0 Breakdown

Attack Vector
Adjacent
Attack Complexity
High
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/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

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS v3.0 Breakdown

Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Chatchat-space Langchain-Chatchat affected 0.3.1.0 Not specified
CNA Chatchat-space Langchain-Chatchat affected 0.3.1.1 Not specified
CNA Chatchat-space Langchain-Chatchat affected 0.3.1.2 Not specified
CNA Chatchat-space Langchain-Chatchat affected 0.3.1.3 Not specified

References

ReferenceSourceLinkTags
vuldb.com/vuln/361124/cti [email protected] vuldb.com
github.com/3em0/cve_repo/blob/main/Langchain-Chatchat/Vuln-1-tobytes-Has... [email protected] github.com
github.com/chatchat-space/Langchain-Chatchat [email protected] github.com
vuldb.com/submit/807794 [email protected] vuldb.com
vuldb.com/vuln/361124 [email protected] vuldb.com
github.com/chatchat-space/Langchain-Chatchat/issues/5462 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Dem00 (VulDB User) (en)

CNA: VulDB CNA Team (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-05-05T00:00:00.000ZAdvisory disclosed
CNA2026-05-05T02:00:00.000ZVulDB entry created
CNA2026-05-05T12:26:13.000ZVulDB entry last update
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