CVE-2026-91825
MISP: Missing Authorization Check for Event Sharing Group When Distribution Field Is Omitted During Edit
02 Description
MISP: Missing Authorization Check for Event Sharing Group When Distribution Field Is Omitted During Edit
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.38% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 32.7% of scored records. A rank, not a probability.
- NVD base score
- 7.1 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/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
- NVD analysis status
- Deferred. NVD last modified this record on 2026-09-16.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-09-15 08:06Z1 MO AGO
- Last updated
- 2026-09-15 14:19Z1 MO AGO
- Reserved
- 2026-09-15
- Assigning CNA
- CIRCL
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.1)
- CNA CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
- Weaknesses
- CWE-862Missing AuthorizationClass
- Data version
- 5.2
- Document digest
- 3d548cf4be2f1170b9c9816c26938f94902bc1991e355923470f1d082e5d0399
05 Affected products
06 References
- github.comSecurity patchhttps://github.com/MISP/MISP/commit/cf3ee4026
07 Remediation
The fix adds an explicit authorization check for the sharing_group_id in the code path where the distribution field is omitted from the edit request. In the controller, if no distribution is submitted but a sharing_group_id is present and differs from the stored value, the user's access to that sharing group is verified via checkIfCanBeUsed before the edit proceeds. In the model's _edit method, a parallel check via checkIfAuthorised is added for the same condition, returning an error if the user is not authorized for the submitted sharing group. This closes the gap where omitting the distribution field bypassed the existing authorization gate.