Linux · 
Debian · Security advisory · September 30, 2026
Debian · Security advisory · September 30, 2026DEBIAN-CVE-2026-19773: libwebsockets security update
DEBIAN-CVE-2026-19773, released September 30, 2026, fixes 1 CVE in libwebsockets. None of them is reported as exploited. Patch Radar priority: Urgent.
Urgent
CVEs closed
1
1 rated Critical
Exploited
0
None reported
Highest CVSS
9.8
Base score, 0 to 10
Highest EPSS
0.0065
51st percentile
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| libwebsockets | Debian 13.5 (trixie) | 4.3.5-1+deb13u3 |
| libwebsockets | Debian 14 | 4.3.5-7 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| Urgent | CVE-2026-19773 | libwebsockets: libwebsockets HTTP/2 HPACK Path Header Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability | 9.8 | 0.0065 | None reported |
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