CVE-2026-96655: Plex Media Server Server-Side Request Forgery (SSRF) Vulnerability

Q: How do I fix CVE-2026-96655?

media server: upgrade to 1.43.3.10861. Exact commands for each OS are on this page.

Q: Is CVE-2026-96655 being exploited?

Yes. CVE-2026-96655 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

Q: What does CVE-2026-96655 affect?

CVE-2026-96655 affects media server. Severity is medium (CVSS 4.3). Plex Media Server before 1.43.3.10861 allows an authenticated user to request arbitrary internal or external addresses via the '/video/:/transcode/universal' path parameter.

Q: How urgent is CVE-2026-96655?

Priority 50/100. Exploited in the wild (CISA KEV)

Patch now

MEDIUM 4.3EXPLOITEDUPGRADE

CVE-2026-96655 is a medium-severity flaw (CVSS 4.3) affecting media server, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Plex Media Server before 1.43.3.10861 allows an authenticated user to request arbitrary internal or external addresses via the '/video/:/transcode/universal' path parameter.

Why this priority

Exploited in the wild (CISA KEV)

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 61%)
CISA exploited list	Yes, fix due 2026-11-03
Weakness	CWE-918
Published	2026-09-23
Last modified	2026-10-21

Publisher (CNA): Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government · Vendor: plex

Last updated 2026-10-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-23 17:17 UTCPublished CVE record published
2026-10-20Exploited Added to the CISA Known Exploited Vulnerabilities list
2026-10-21 13:09 UTCUpdated Record last modified
2026-11-03Deadline CISA due date for US federal agencies to patch

plex media server UPGRADE

Affected: < 1.43.3.10861

Fixed in: 1.43.3.10861

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy media-server || rpm -q media-server || media-server --version

2. UPGRADE to 1.43.3.10861 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade media-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade media-server

Note

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

Exact fixes by distribution

Fedora 46 · retext · FIXED · 8.1.0-1.fc46 · FEDORA-2026-0602a84203 · source

sudo dnf upgrade --advisory=FEDORA-2026-0602a84203

Advisories and coverage

Official advisories

CISA Alerts and Advisories: CISA Adds Six Known Exploited Vulnerabilities to Catalog 2026-10-20

Verify at the official source NVD · CVE Program · CISA KEV catalog · 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-2026-96655?

media server: upgrade to 1.43.3.10861. Exact commands for each OS are on this page.

Is CVE-2026-96655 being exploited?

Yes. CVE-2026-96655 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2026-96655 affect?

CVE-2026-96655 affects media server. Severity is medium (CVSS 4.3). Plex Media Server before 1.43.3.10861 allows an authenticated user to request arbitrary internal or external addresses via the '/video/:/transcode/universal' path parameter.

How urgent is CVE-2026-96655?

Priority 50/100. Exploited in the wild (CISA KEV)

Related CVEs

CVE-2026-96652 MEDIUM 4.3 EXPLOITED UPGRADE Plex Media Server Server-Side Request Forgery (SSRF) Vulnerability
CVE-2026-96654 MEDIUM 6.5 EXPLOITED UPGRADE Plex Media Server Improper Neutralization of Encoded URI Schemes in a Web Page Vulnerability
CVE-2026-96656 HIGH 7.2 EXPLOITED UPGRADE Plex Media Server External Control of File Name or Path Vulnerability

References

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