CVE-2026-52718 | Gstreamer1-plugins-bad-free: gstreamer: denial of service via av1 tile_list_obu parser byte/bit confusion

A denial of service vulnerability was found in GStreamer's AV1 codec parser in gst-plugins-bad. The gst_av1_parser_parse_tile_list_obu() function passes a byte count to a bit-reader API that expects a bit count, causing parser desynchronization. A remote attacker could trick a user into opening a specially crafted AV1 media file, triggering an assertion abort and causing the application to crash.

Published: 2026-06-15 Last update: 2026-06-15 Assigner: [email protected] Source: [email protected]
NVD Status：Awaiting Analysis，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-52718 is rated Low Risk (33.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.31%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-52718

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-16 — 0.31% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-52718

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]

Weakness enumeration for CVE-2026-52718

GitHub Security Advisory for CVE-2026-52718

GHSA-4cjw-rphc-c5v6 · Severity: medium — A denial of service vulnerability was found in GStreamer's AV1 codec parser in gst-plugins-bad....

OS Trackers for CVE-2026-52718

vendor priority summary link
debian not yet assigned CVE-2026-52718 not yet assigned priority: Debian including 1 source packages (gst-plugins-bad1.0), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 4, resolved 1. https://security-tracker.debian.org/tracker/CVE-2026-52718
redhat medium — https://access.redhat.com/security/cve/CVE-2026-52718
suse medium CVE-2026-52718 severity moderate: SUSE including 27 source package names (gstreamer-plugins-bad, gstreamer-plugins-bad-chromaprint, …), 91 product×package rows across 7 product lines (SUSE Linux Enterprise Server 12 SP4-LTSS, SUSE Linux Enterprise Server 12 SP5-LTSS, … (7 product lines)): Known Not Affected 91. https://www.suse.com/security/cve/CVE-2026-52718/

Affected software / configurations for CVE-2026-52718

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2026-52718

cvelogic Threat Intelligence