Information Disclosure in yt-dlp (CVE-2026-50019)
Summary
Vulnerability in yt-dlp (CVE-2026-50019). Confidential information can be exposed externally. Exploitable via curl. Mitigation: upgrade to 2026.6.9 or later.
Original description
The description as published by the source.
yt-dlp is a command-line audio/video downloader. From 2023.09.24 until 2026.06.09, if curl is used as an external downloader for yt-dlp, cookies may be leaked to an unintended host upon HTTP redirect or when the host for download fragments differs from their parent manifest's. At the file download stage, the cookies are passed by yt-dlp to the file downloader via --cookie. However, unless these are loaded from a file, this operation does not activate the cookie engine. As a result, curl will send cookies with requests to domains or paths for which the cookies are not scoped. This vulnerability is fixed in 2026.06.09.
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-2026-50019 has been found in yt-dlp.
Attackers can target a specific entry point like curl over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 6.1/10.
What to do: upgrade yt-dlp to 2026.6.9 or later.
If unsure, ask your IT team or search "yt-dlp CVE-2026-50019" on the vendor's site.
CVE-2026-50019 (yt-dlp) — CWE-200 / CVSS v3 6.1
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: curl
Patched: 2026.6.9 — 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.
Information disclosure (CWE-200) exists in yt-dlp. Attackers reach the vulnerable code path via curl without authentication.
Check the vendor advisory for the affected versions of yt-dlp. Attack surface: curl.
Severity: Medium (CVSS 6.1/10). Confidential information can be exposed externally.
Update to 2026.6.9.
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. Run grep -r 'yt-dlp' . 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 'yt-dlp' . | 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
yt-dlpを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade yt-dlp to 2026.6.9ステージング環境で 2026.6.9 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。
-
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。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-50019 yt-dlp
- Ubuntu UBUNTU-CVE-2026-50019 yt-dlp
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- web github.com
- web github.com
- web github.com
- web github.com
- web pypi.org