VDB
CVE-2026-15711
CVE-2026-15711
PUBLISHED
CVSS 7.5 HIGH
Reported by redhat · Published July 14, 2026
A vulnerability was found in libsoup's WebSocket frame parsing implementation. The library fails to validate length rules specified in RFC 6455 §5.5, which mandates that all WebSocket control frames (e.g., PING, PONG, CLOSE) contain a payload of 125 bytes or less. A remote, unauthenticated attacker can exploit this by sending a non-compliant, oversized control frame. Because the parser handles this protocol violation improperly instead of throwing an immediate connection termination error, it triggers a internal processing crash, resulting in a remote denial of service (DoS) for applications utilizing libsoup WebSockets.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | 0:3.6.5-3.el10_2.14 |
| Red Hat | Red Hat Enterprise Linux 8 | 0:2.62.3-15.el8_10 |
| Red Hat | Red Hat Enterprise Linux 8 | 0:2.62.3-15.el8_10 |
| Red Hat | Red Hat Enterprise Linux 9 | 0:2.72.0-16.el9_8.3 |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | 0:2.72.0-10.el9_6.9 |
| Red Hat | Red Hat Enterprise Linux 6 | |
| Red Hat | Red Hat Enterprise Linux 7 | |
| Red Hat | Red Hat Enterprise Linux 10 | 0:3.6.5-3.el10_2.14, 0:3.6.5-3.el10_2.14 |
| Red Hat | Red Hat Enterprise Linux 8 | 0:2.62.3-15.el8_10, 0:2.62.3-15.el8_10, 0:2.62.3-15.el8_10 |
| Red Hat | Red Hat Enterprise Linux 7 | |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | 0:2.72.0-10.el9_6.9 |
| Red Hat | Red Hat Enterprise Linux 6 | |
| Red Hat | Red Hat Enterprise Linux 9 | 0:2.72.0-16.el9_8.3, 0:2.72.0-16.el9_8.3 |
Timeline
- Jul 14, 2026 CVE Published
- Jul 15, 2026 Coalition ESS Score
- Jul 16, 2026 Security Advisory
- Aug 7, 2026 EPSS Score
- Aug 24, 2026 EPSS Score
- Aug 26, 2026 EPSS Score
- Aug 30, 2026 EPSS Score
- Sep 3, 2026 EPSS Score
- Sep 6, 2026 EPSS Score
- Sep 9, 2026 EPSS Score
- Sep 12, 2026 EPSS Score
- Sep 16, 2026 EPSS Score
References
- RHSA-2026:68234 vendor-advisoryx_refsource_REDHAT
- RHSA-2026:68235 vendor-advisoryx_refsource_REDHAT
- RHSA-2026:68266 vendor-advisoryx_refsource_REDHAT
- RHSA-2026:68612 vendor-advisoryx_refsource_REDHAT
- vdb-entryx_refsource_REDHAT
- RHBZ#2499924 issue-trackingx_refsource_REDHAT