EUVD-2026-72358
GHSA-2qxh-mhcg-87xg
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/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
PR:L because a valid MISP account of any role is required; C:H for full key_data disclosure; I:N and A:N because exploitation yields read-only access to key material with no write or availability path.
Primary rating from Vendor (CIRCL).
CVSS VectorVendor: CIRCL
Lifecycle Timeline
4DescriptionCVE.org
Affected versions of MISP do not enforce parent-event visibility when serving cryptographic keys through CryptographicKeysController::view().
The vulnerable handler queried CryptographicKey directly using the supplied key ID and selected sensitive fields such as:
* type
* key_data
* fingerprint
but did not fetch or authorize the associated parent event first.
The upstream commit explicitly states that cryptographicKeys/view could return a protected event’s signing key to any authenticated user.
The fix adds parent_id and parent_type to the lookup and then enforces authorization through the associated event using fetchSimpleEvent($user, parent_id). If the parent is not an Event, access is limited to site administrators.
Version affected: ≤2.5.45
AnalysisAI
Missing authorization in MISP versions 2.5.45 and earlier exposes cryptographic signing key material - including raw key data, key type, and fingerprint - to any authenticated user on the platform, regardless of whether they are permitted to view the associated parent event. The CryptographicKeysController::view() handler fetched CryptographicKey records directly by supplied ID without resolving or authorizing the parent event, enabling cross-event key exfiltration within shared MISP instances. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid, authenticated MISP account at any privilege level - a read-only or guest account with PR:L (per the CVSS 4.0 vector) is sufficient. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 base score of 7.1 (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N) accurately reflects the core exposure: a network-accessible, low-privilege account can retrieve the full signing key material for any restricted or protected event whose keys are stored in MISP, with no special configuration and no user interaction required. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade MISP to a version incorporating upstream commit 2edde619b, available at https://github.com/MISP/MISP/commit/2edde619b; administrators should consult the MISP GitHub releases page for the first tagged release that includes this commit, as an exact patched version number is not confirmed from available input data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all MISP instances in production and determine which are running version 2.5.45 or earlier. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
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External POC / Exploit Code
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