Socket.IO enables bidirectional and low-latency communication for every platform. From 6.5.0 before 6.6.7, Engine.IO servers with WebTransport enabled can resolve a crafted session ID such as __proto__ through an inherited property of the c…
Exact source revision recorded 1 Nov 2026 11:24:06 UTC. It does not establish the source's current position. Latest evidence.
euvd · EUVD-2026-42312
PublishedSocket.IO enables bidirectional and low-latency communication for every platform. From 6.5.0 before 6.6.7, Engine.IO servers with WebTransport enabled can resolve a crafted session ID such as __proto__ through an inherited property of the clients object during WebTransport upgrade handling, causing a TypeError and denial of service. This issue is fixed in version 6.6.7.
EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.
Original publisher date fields
datePublished: Jul 8, 2026, 3:35:39 PM
dateUpdated: Jul 8, 2026, 7:41:18 PM
1 related source bulletins · separate from aliases
RHSA-2026:26994: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
CVE-2026-45491 · CVE-2026-45591 · CVE-2026-45736 · CVE-2026-59724 · CVE-2026-59868 · CVE-2026-59870
- Source published
- Jul 8, 2026, 3:35:39 PM (timezone not stated)
- Source modified
- Jul 8, 2026, 7:41:18 PM (timezone not stated)
- Observed here
- 1 Nov 2026 11:24:06 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
Original source record · Cite this exact observation · Complete original publisher JSON
This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.
EUVD CVSS 3.1 · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H