EUVD-2026-72370
GHSA-qp9m-r348-236g
Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:H/SC:H/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
Admin-only feed/TAXII configuration (PR:H); scope change from SSRF crossing into internal network (S:C); high confidentiality from credential forwarding and internal data access; no write or availability impact described.
Primary rating from Vendor (CIRCL).
CVSS VectorVendor: CIRCL
Lifecycle Timeline
3DescriptionCVE.org
Affected versions of MISP contain insufficient validation of server-side outbound HTTP destinations in feed retrieval and TAXII discovery functionality.
In feed processing, redirects were followed without validating the redirect scheme or destination. The original request headers were reused across redirect hops, meaning authentication headers or API credentials configured for a feed could be forwarded to a different host. Redirects could also target internal network resources, resulting in SSRF. The fix adds redirect validation, blocks internal destinations for cross-host redirects, strips configured feed credentials before following redirects to another host, and pins validated DNS results to prevent re-resolution after validation.
The TAXII discovery endpoint had a related incomplete SSRF defense. It used gethostbyname() and compared the result against only a few literal addresses. This missed cases including IPv6 loopback (::1), numeric host encodings such as 0x7f000001, and potentially multiple DNS records. The fix moves TAXII discovery to the shared URL egress validator.
Together, these commits harden MISP's outbound URL handling against alternate-address representations, DNS-related bypasses, unsafe redirects, internal-host access, and cross-host credential forwarding.
Version affected: ≤2.5.45
AnalysisAI
Server-side request forgery in MISP ≤2.5.45 allows high-privileged users who configure threat intelligence feeds or TAXII discovery endpoints to cause MISP to make outbound HTTP requests to internal network resources and to exfiltrate configured feed authentication credentials to attacker-controlled hosts via unsanitized redirect following. A secondary incomplete SSRF defense in the TAXII discovery path failed to block IPv6 loopback (::1), hex-encoded addresses (0x7f000001), and multi-record DNS responses because it relied on gethostbyname() against a short literal blocklist. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires high-privilege access to MISP - specifically, the ability to create or modify feed configurations or initiate TAXII discovery requests (PR:H, administrator role). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor CVSS 4.0 score of 7.0 (AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:H/SC:H/SI:N/SA:N) accurately captures that exploitation is network-accessible but gated on high-privilege access (PR:H - configuring MISP feeds requires administrator rights), and that the primary harm falls on subsequent systems (SC:H - internal services reachable via SSRF). … 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 | Apply the upstream patch by updating MISP to a version that includes commits 08d6efe24 (https://github.com/MISP/MISP/commit/08d6efe24) and 06f541dcf (https://github.com/MISP/MISP/commit/06f541dcf); an exact tagged release version was not specified in the advisory data, so administrators should verify their installation incorporates both commits. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all MISP deployments to identify instances running version 2.5.45 or earlier and audit which users hold feed configuration privileges. …
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External POC / Exploit Code
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