01 Record
CVE-2026-72860
9router Server-Side Request Forgery via /api/provider-nodes/validate Because the IPv4-Mapped IPv6 Denylist Check Is Unreachable
MediumPUBLISHEDCNA: VulnCheck
CNA base score6.3 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N
02 Description
9router Server-Side Request Forgery via /api/provider-nodes/validate Because the IPv4-Mapped IPv6 Denylist Check Is Unreachable
03 Exploitation and scoring
- Exploitation
- Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
- SSVC decision
- ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
- 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 32.1% of scored records. A rank, not a probability.
- NVD base score
- 6.3 (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:N/VI:N/VA:N/SC:H/SI:L/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 2026-10-18.
- 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
- 2026-08-20 21:35Z2 MO AGO
- Last updated
- 2026-09-24 14:19Z1 MO AGO
- Reserved
- 2026-08-10
- Assigning CNA
- VulnCheck
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 6.3)
- CNA CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N
- Weaknesses
- Data version
- 5.2
- Document digest
- dead6fcce3ead6df2d644e8534257b840e2cd9979f39f5e4d7b47b7ba6449d31
05 Affected products
VendorProductVersionsPlatforms
06 References
- github.comGitHub Issue #3293https://github.com/decolua/9router/issues/3293
- github.comassertPublicUrl and the unreachable IPv4-mapped branch in isBlockedIpv6https://github.com/decolua/9router/blob/master/src/shared/utils/ssrfGuard.js
- github.comvalidate route applying the guard and reflecting 200 byteshttps://github.com/decolua/9router/blob/master/src/app/api/provider-nodes/validate/route.js
- github.comProposed fix judging mapped addresses by address rather than spelling (not merged)https://github.com/decolua/9router/pull/3370
- github.comhttps://github.com/decolua/9router
- www.vulncheck.comVulnCheck Advisory: 9router Server-Side Request Forgery via /api/provider-nodes/validate Because the IPv4-Mapped IPv6 Denylist Check Is Unreachablehttps://www.vulncheck.com/advisories/9router-server-side-request-forgery-via-api-provider-nodes-validate-because-the-ipv4-mapped-ipv6-denylist-check-is-unreachable