EUVD-2026-95124
GHSA-jmpw-6qm3-5h67
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable with low complexity and no privileges, but the client must initiate the RTSP connection to the attacker (UI:R); impact is availability-only (A:H), no C/I.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
FFmpeg through 9.0.2 contains an infinite loop vulnerability in ff_rtsp_connect() in libavformat/rtsp.c that follows RTSP 3xx redirects without any redirect limit. Attackers controlling an RTSP server can answer every request with a 302 redirect to itself or another server, causing endless reconnects that saturate a CPU core.
AnalysisAI
FFmpeg through 9.0.2 contains an infinite loop in ff_rtsp_connect() (libavformat/rtsp.c) because the RTSP client follows 3xx redirects without a redirect limit, allowing a malicious RTSP server to cause endless reconnects that saturate a CPU core. Exploitation is remote and unauthenticated (CVSS PR:N) but requires passive user interaction (UI:P/UI:R): the victim must open an RTSP stream that resolves to the attacker-controlled server, which then answers every request with a 302 redirect to itself or another server. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the FFmpeg-based client actually opens an RTSP stream and that the attacker controls the RTSP server at the target URL (or can cause a redirect to one) - the attacker then replies to every request with a 3xx (e.g., 302) redirect, which ff_rtsp_connect() follows with no redirect-count limit. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but bounded availability threat, not a top-tier emergency. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the upstream fix (PR 24902) or upgrade to an FFmpeg release that incorporates it; a released patched version is not independently confirmed, so verify the exact version from the vendor. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all FFmpeg deployments and specifically identify services that automatically open or accept user-supplied RTSP URLs; apply the vendor patch per advisory to move off affected FFmpeg versions through 9.0.2, or where patching cannot be completed immediately, restrict outbound RTSP to trusted destinations, disable automatic RTSP URL opening, and add redirect/timeout limits at the network or application proxy. …
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External POC / Exploit Code
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