Cross-Site Scripting (XSS) in kortix-ai suna (CVE-2026-12811)
Summary
Cross-site scripting in kortix-ai suna (CVE-2026-12811). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 0.8.39 or later.
Original description
The description as published by the source.
A weakness has been identified in kortix-ai suna up to 0.8.38. Affected by this issue is the function router.replace/router.push of the file apps/frontend/src/app/auth/page.tsx of the component Auth Endpoint. Executing a manipulation of the argument returnURL can lead to cross site scripting. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 0.8.39 can resolve this issue. This patch is called f5dec7aa0c1b8fa0125938f292c0f2430ca75f6c. It is advisable to upgrade the affected component. The researcher explains: "The issue was fixed in v0.8.39 without notifying the wider user base via a security disclosure."
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-12811 has been found in kortix-ai suna.
Risk of unauthorized operations or information disclosure. CVSS score: 4.3/10.
What to do: upgrade kortix-ai suna to 0.8.39 or later.
If unsure, ask your IT team or search "kortix-ai suna CVE-2026-12811" on the vendor's site.
CVE-2026-12811 (kortix-ai suna) — CWE-79 / CVSS v3 4.3
Attack vector: remote (network-reachable) / unauthenticated
Patched: 0.8.39 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Cross-site scripting (XSS) (CWE-79) exists in kortix-ai suna.
Check the vendor advisory for the affected versions of kortix-ai suna.
Severity: Medium (CVSS 4.3/10). Risk of unauthorized operations or information disclosure.
Update to 0.8.39.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで kortix-ai suna を使っているサービスとバージョンを洗い出す。
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2Apply patch patch
Upgrade kortix-ai suna to 0.8.39ステージング環境で 0.8.39 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
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3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- advisory nvd.nist.gov
- advisory vuldb.com
- advisory vuldb.com
- advisory vuldb.com
- advisory github.com
- patch github.com
- patch github.com
- report gist.github.com
- report vuldb.com
- web github.com
- web github.com
- web github.com