High severity · published Aug 28, 2026
CVE-2026-82280
Quivr Prompt Endpoints Missing Ownership Validation
7.1
CVSS
0.4%
EPSS
No
On KEV
Description
Quivr through 0.0.322 fails to validate ownership in prompt endpoints, allowing authenticated users to modify any prompt by identifier. Attackers with read-only access to shared brains can read exposed prompt identifiers and overwrite system prompts affecting all brain users.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QU
quivr · QuivrHQ
through 0.0.322 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82280
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-82280
github.com
https://github.com/QuivrHQ/quivr
github.com
https://github.com/QuivrHQ/quivr/blob/v0.0.322/backend/api/quivr_api/modules/prompt/controller/prompt_routes.py
github.com
https://github.com/QuivrHQ/quivr/issues/3698
www.vulncheck.com
https://www.vulncheck.com/advisories/quivr-prompt-endpoints-missing-ownership-validation
github.com
https://github.com/The-Vibe-Company/Quivr/issues/3698
More from quivr
8.1
CVE-2026-82284
Quivr Chat Endpoints Missing Ownership Validation