SSRF (Server-Side Request Forgery) in Kavita (CVE-2026-110223)
Summary
SSRF in Kavita (CVE-2026-110223). Risk of unauthorized operations or information disclosure. Exploitable via POST /api/Cbl/upload-cbl-file.
Original description
The description as published by the source.
Kavita 0.9.0 through 0.9.1.4 contains a server-side request forgery vulnerability that allows authenticated users to bypass the SSRF blocklist through DNS rebinding or HTTPS redirects. Attackers can submit a URL to POST /api/Cbl/upload-cbl-file whose host rebinds or redirects to internal addresses after validation, enabling blind internal port and service probing.
Source: NIST National Vulnerability Database 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-2026-110223 has been found in Kavita.
Attackers can target a specific entry point like POST /api/Cbl/upload-cbl-file over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 3.1/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Kavita CVE-2026-110223" on the vendor's site.
CVE-2026-110223 (Kavita) — CWE-918 / CVSS v3 3.1
Attack vector: remote (network-reachable) / no user interaction
Attack surface: POST /api/Cbl/upload-cbl-file
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.
SSRF (CWE-918) exists in Kavita. Attackers reach the vulnerable code path via POST /api/Cbl/upload-cbl-file.
Check the vendor advisory for the affected versions of Kavita. Attack surface: POST /api/Cbl/upload-cbl-file.
Severity: Low (CVSS 3.1/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual POST /api/Cbl/upload-cbl-file requests with malformed payloads or SQL meta-characters. Run grep -r 'Kavita' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'Kavita' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
Kavitaを grep し、稼働しているサービス・バージョンを把握する。 -
2Hunt for indicators of compromise detect
grep 'POST /api/Cbl/upload-cbl-file' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
POST /api/Cbl/upload-cbl-fileへの異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。 -
3Post-deployment verification verify
Replay attack against POST /api/Cbl/upload-cbl-file on staging to confirm patch closes the vector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 Step 2 と同じログクエリでアラート再発が無いか継続監視。