01 Record
CVE-2026-102989
TanStack Router: Unauthenticated reflected XSS in TanStack Start server-function responses
CriticalPUBLISHEDCNA: GitHub_M
CNA base score9.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
02 Description
TanStack Router: Unauthenticated reflected XSS in TanStack Start server-function responses
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 ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.54% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 45.3% of scored records. A rank, not a probability.
- NVD base score
- 9.3 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
- NVD analysis status
- Awaiting Analysis. NVD last modified this record on 2026-10-16.
- 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
- 2026-10-13 16:13Z15 DAYS AGO
- Last updated
- 2026-10-14 15:20Z14 DAYS AGO
- Reserved
- 2026-09-29
- Assigning CNA
- GitHub_M
- Record state
- PUBLISHED
- Severity
- Critical (CVSS 9.3)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
- Weaknesses
- CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base
- Data version
- 5.2
- Document digest
- c344c771c82f7f46e3a4da1d4b49933138b2c66668e82b0eb26b30f748c95f0b
05 Affected products
VendorProductVersionsPlatforms
06 References
- github.comhttps://github.com/TanStack/router/security/advisories/GHSA-qx66-fv34-fjm8
- github.comhttps://github.com/TanStack/router/pull/8573
- github.comhttps://github.com/TanStack/router/commit/d521abd71c69f1ff010bb3def4d417cb5fa058cb
- github.comhttps://github.com/TanStack/router/releases/tag/release-2026-09-30-1747