Description
A NULL pointer dereference flaw was found in GStreamer's RTSP support library. The vulnerability occurs while parsing an Authorization or WWW-Authenticate header that uses Digest authentication. Specially crafted whitespace placement around a parameter's terminator can cause an internal length calculation to underflow, leading to a crash of the process parsing the header. On an RTSP server this can be triggered by a remote, unauthenticated attacker sending a single malformed request when the server has authentication enabled; the same flaw can also be triggered against an RTSP client by a malicious or compromised RTSP server. Successful exploitation results in a denial of service (application crash) and has no confirmed impact on confidentiality or integrity.
References7
- access.redhat.com/errata/RHSA-2026:66460
- access.redhat.com/errata/RHSA-2026:67145
- access.redhat.com/errata/RHSA-2026:69100
- access.redhat.com/security/cve/CVE-2026-85150
- bugzilla.redhat.com/show_bug.cgi?id=2527936
- gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_req…
- gitlab.freedesktop.org/gstreamer/gstreamer/-/blob/main/subproje…
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 45 · as of 3 November 2026
- CWE
- CWE-476
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.