CVE-2026-18649

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.86% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 56.0% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-09-01.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-08-06 06:48Z29 DAYS AGO

Last updated

2026-09-01 11:44Z3 DAYS AGO

Reserved

2026-08-03

Assigning CNA

redhat

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

• CWE-770Allocation of Resources Without Limits or ThrottlingBase

Data version

5.2

Document digest

73c0075da5a7a7945c5221002a44050559386fe944c2a380546cacc48d38ee62

• 0xsemizzz.vercel.apphttps://0xsemizzz.vercel.app/blog/cve-2026-18649-gstreamer-rtp-dos/
• access.redhat.comRHSA-2026:53451https://access.redhat.com/errata/RHSA-2026:53451vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:53452https://access.redhat.com/errata/RHSA-2026:53452vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:56966https://access.redhat.com/errata/RHSA-2026:56966vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:61588https://access.redhat.com/errata/RHSA-2026:61588vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:61943https://access.redhat.com/errata/RHSA-2026:61943vendor-advisoryx_refsource_REDHAT
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-18649vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2510614https://bugzilla.redhat.com/show_bug.cgi?id=2510614issue-trackingx_refsource_REDHAT
• gitlab.freedesktop.orghttps://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/113