← Back
CVE-2026-45106
medium
CVSS 4.6
Cross-Site Scripting (XSS) in weblate (CVE-2026-45106)
Summary
cross-site scripting in weblate (CVE-2026-45106). Risk of unauthorized operations or information disclosure. Exploitable via ``source``. Mitigation: upgrade to `2026.5` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-45106** has been found in weblate.
Attackers can target a specific entry point like ``source`` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 4.6/10.
What to do: upgrade weblate to **2026.5** or later.
If unsure, ask your IT team or search "weblate CVE-2026-45106" on the vendor's site.
CVE-2026-45106 (weblate) — CWE-79 / CVSS v3 4.6
Attack vector: remote (network-reachable)
Attack surface: `source` / `context`
Patched: `2026.5` — apply immediately
Workaround: Only the search preview on the selected views is affected.
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 weblate. Attackers reach the vulnerable code path via ``source`` without authentication.
📍 Affected scope
weblate — . Attack surface: `source` / `context`.
🔥 Severity
Severity: Medium (CVSS 4.6/10). Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **2026.5**.
🛡️ Workaround
Workaround: Only the search preview on the selected views is affected.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'weblate' .` 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
-
1Identify exposure identify
grep -r 'weblate' . | 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 `weblate` を grep し、稼働しているサービス・バージョンを把握する。
-
5Apply temporary workaround mitigate
Only the search preview on the selected views is affected.パッチが適用されるまでの応急処置として、Only the search preview on the selected views is affected. を実施。回避策の副作用 (機能低下) を確認した上で。
-
6Apply patch patch
Upgrade weblate to 2026.5ステージング環境で 2026.5 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。
-
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
pip
weblate
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2026.5"}]}]
PyPI
weblate
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2026.5"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-45106
- package https://github.com/WeblateOrg/weblate
- web https://github.com/WeblateOrg/weblate/security/advisories/GHSA-6wxc-8mgq-w26m
- web https://github.com/WeblateOrg/weblate/pull/19422
- web https://github.com/WeblateOrg/weblate/commit/8b0adf1d0b43dfc0d09da4b878857b2288b84f2d
- web https://github.com/WeblateOrg/weblate/releases/tag/weblate-2026.5
- web https://github.com/advisories/GHSA-6wxc-8mgq-w26m