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CVE-2026-28737
high
CVSS 8.7
Cross-Site Scripting (XSS) in code.gitea.io/gitea (CVE-2026-28737)
Summary
cross-site scripting in code.gitea.io/gitea (CVE-2026-28737). Confidential information can be exposed externally. Exploitable via ``innerHTML``. Mitigation: upgrade to `1.26.0` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-28737** has been found in code.gitea.io/gitea.
Attackers can target a specific entry point like ``innerHTML`` over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 8.7/10.
What to do: upgrade code.gitea.io/gitea to **1.26.0** or later.
If unsure, ask your IT team or search "code.gitea.io/gitea CVE-2026-28737" on the vendor's site.
CVE-2026-28737 (code.gitea.io/gitea) — CWE-79 / CVSS v3 8.7
Attack vector: remote (network-reachable)
Attack surface: `innerHTML` / `e33d1da...` / `extensionsRequired` / `SetError`
Patched: `1.26.0` — 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.
❓ What is the problem
**Cross-site scripting (XSS)** (CWE-79) exists in code.gitea.io/gitea. Attackers reach the vulnerable code path via ``innerHTML`` without authentication.
📍 Affected scope
code.gitea.io/gitea — . Attack surface: `innerHTML` / `e33d1da...` / `extensionsRequired` / `SetError`.
🔥 Severity
Severity: High (CVSS 8.7/10). Confidential information can be exposed externally
🔧 How to fix
Update to **1.26.0**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'code.gitea.io/gitea' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'code.gitea.io/gitea' . | 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 `code.gitea.io/gitea` を grep し、稼働しているサービス・バージョンを把握する。
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6Apply patch patch
Upgrade code.gitea.io/gitea to 1.26.0ステージング環境で 1.26.0 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と、Step 3 で見つけた異常検知の続報チェックを含めること。
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7Post-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 Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
go
code.gitea.io/gitea
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.26.0"}]}]