CVE-2023-35934: yt-dlp is a command-line program to download videos from video sites

Q: How do I fix CVE-2023-35934?

youtube-dlc: mitigate or apply the listed mitigation; youtube-dl: downgrade or apply the listed mitigation; yt-dlp: upgrade to 2023.07.06, 2023.07.06.185519. Exact commands for each OS are on this page.

Q: Is CVE-2023-35934 being exploited?

CVE-2023-35934 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-35934 affect?

CVE-2023-35934 affects youtube-dlc, youtube-dl, yt-dlp. Severity is medium (CVSS 6.1). yt-dlp is a command-line program to download videos from video sites. During file downloads, yt-dlp or the external downloaders that yt-dlp employs may leak cookies on HTTP redirects to a different host, or leak them when the host for downl

Q: How urgent is CVE-2023-35934?

Priority 37/100. No elevated risk signals yet.

Routine

MEDIUM 6.1MITIGATEDOWNGRADEUPGRADE

CVE-2023-35934 is a medium-severity flaw (CVSS 6.1) affecting youtube-dlc, youtube-dl, yt-dlp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

yt-dlp is a command-line program to download videos from video sites. During file downloads, yt-dlp or the external downloaders that yt-dlp employs may leak cookies on HTTP redirects to a different host, or leak them when the host for download fragments differs from their parent manifest's host. This vulnerable behavior is present in yt-dlp prior to 2023.07.06 and nightly 2023.07.06.185519. All native and external downloaders are affected, except

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.0% (top 36%)
CISA exploited list	No
Weakness	CWE-200, CWE-601
Published	2023-07-06
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: fedoraproject · youtube-dlc project · yt-dl · yt-dlp project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-07-06 20:15 UTCPublished CVE record published
2026-06-17 06:05 UTCUpdated Record last modified

youtube-dlc project youtube-dlc MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy youtube-dlc || rpm -q youtube-dlc || youtube-dlc --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

yt-dl youtube-dl DOWNGRADE

Affected: >= 2015.01.25

Fixed in: no fixed release known

Safe to downgrade to: a release before 2015.01.25

1. Check installed version

apt-cache policy youtube-dl || rpm -q youtube-dl || youtube-dl --version

2. No fixed release: DOWNGRADE to a release before 2015.01.25 (Debian / Ubuntu)

apt-cache madison youtube-dl sudo apt install youtube-dl=<VERSION_BEFORE_2015.01.25> sudo apt-mark hold youtube-dl

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list youtube-dl sudo dnf downgrade youtube-dl-<VERSION_BEFORE_2015.01.25> sudo dnf versionlock add youtube-dl

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

yt-dlp project yt-dlp UPGRADE

Affected: < 2023.07.06 · < 2023.07.06.185519

Fixed in: 2023.07.06, 2023.07.06.185519

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy yt-dlp || rpm -q yt-dlp || yt-dlp --version

2. UPGRADE to 2023.07.06 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade yt-dlp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade yt-dlp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

fedoraproject fedora MITIGATE

Affected: 37 · 38

Fixed in: no fixed release known

Safe to downgrade to: a release before 37

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-35934?

youtube-dlc: mitigate or apply the listed mitigation; youtube-dl: downgrade or apply the listed mitigation; yt-dlp: upgrade to 2023.07.06, 2023.07.06.185519. Exact commands for each OS are on this page.

Is CVE-2023-35934 being exploited?

CVE-2023-35934 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-35934 affect?

CVE-2023-35934 affects youtube-dlc, youtube-dl, yt-dlp. Severity is medium (CVSS 6.1). yt-dlp is a command-line program to download videos from video sites. During file downloads, yt-dlp or the external downloaders that yt-dlp employs may leak cookies on HTTP redirects to a different host, or leak them when the host for downl

How urgent is CVE-2023-35934?

Priority 37/100. No elevated risk signals yet.

References

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