Path Traversal in github.com/rclone/rclone (CVE-2026-59732)
Summary
Path traversal in github.com/rclone/rclone (CVE-2026-59732). Risk of unauthorized operations or information disclosure. Exploitable via PUT /bucket/safe/prefix/escaped-from-prefix.txt. Mitigation: upgrade to 1.74.4 or later.
Original description
The description as published by the source.
Rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.74.4, rclone archive extract can write extracted files outside the user-selected destination prefix when extracting a crafted archive containing parent path components such as ../, allowing creation or overwrite of sibling objects in the same bucket or path scope. This issue is fixed in version 1.74.4.
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-2026-59732 has been found in github.com/rclone/rclone.
Attackers can target a specific entry point like PUT /bucket/safe/prefix/escaped-from-prefix.txt over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 5.0/10.
What to do: upgrade github.com/rclone/rclone to 1.74.4 or later.
If unsure, ask your IT team or search "github.com/rclone/rclone CVE-2026-59732" on the vendor's site.
CVE-2026-59732 (github.com/rclone/rclone) — CWE-22 / CVSS v3 5.0
Attack vector: local / unauthenticated
Attack surface: PUT /bucket/safe/prefix/escaped-from-prefix.txt / PUT /bucket/safe/escaped-from-prefix.txt / f.NameInArchive / prefix
Patched: 1.74.4 — 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.
Path traversal (CWE-22) exists in github.com/rclone/rclone. Attackers reach the vulnerable code path via PUT /bucket/safe/prefix/escaped-from-prefix.txt without authentication.
Check the vendor advisory for the affected versions of github.com/rclone/rclone. Attack surface: PUT /bucket/safe/prefix/escaped-from-prefix.txt / PUT /bucket/safe/escaped-from-prefix.txt / f.NameInArchive / prefix.
Severity: Medium (CVSS 5.0/10). Risk of unauthorized operations or information disclosure.
Update to 1.74.4.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual PUT /bucket/safe/prefix/escaped-from-prefix.txt requests with malformed payloads or SQL meta-characters. Run grep -r 'github.com/rclone/rclone' . 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 'github.com/rclone/rclone' . | 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
github.com/rclone/rclone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 'PUT /bucket/safe/prefix/escaped-from-prefix.txt' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
PUT /bucket/safe/prefix/escaped-from-prefix.txt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。 -
3Apply patch patch
Upgrade github.com/rclone/rclone to 1.74.4ステージング環境で 1.74.4 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 2 で見つけた異常検知の続報チェックを含めること。
-
4Post-deployment verification verify
Replay attack against PUT /bucket/safe/prefix/escaped-from-prefix.txt 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。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-59732 rclone
- Ubuntu UBUNTU-CVE-2026-59732 rclone
References
- advisory github.com
- patch github.com
- patch github.com
- web github.com
- web nvd.nist.gov
- web github.com