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certfr-2026-avi-0812 — De multiples vulnérabilités ont été découvertes dans Microsoft Azure Linux. Elles permettent à un attaquant de provoque…

certfr-2026-avi-0812

EUVD-2026-328281

fkie_cve-2026-9675

Affected applications are those using the undici WebSocket client (new WebSocket(...)) that can be induced to connect to an attacker-controlled or compromised WebSocket endpoint.

This is a regression specific to undici 8.1.0. The 6.25.0 line shipped the equivalent cumulative check from the start and is unaffected. The 7.x line never had the maxPayloadSize feature and is also unaffected.

Patches: Upgrade to undici >= 8.5.0.

Workarounds: No workaround is available. The fix must be applied through an upgrade.

GHSA-38rv-x7px-6hhq — undici WebSocket client vulnerable to denial of service via cumulative fragment bypass

Affected: npm: undici

## Impact

The undici WebSocket client enforces `maxPayloadSize` per-frame but does not enforce the cumulative size of fragmented uncompressed messages. A malicious WebSocket server can stream many small fragments that each pass per-frame validation but collectively exceed the configured limit, causing unbounded memory growth in the client process. The result is memory exhaustion and a denial of service.

Affected applications are those using the undici WebSocket client (`new WebSocket(...)`) that can be induced to connect to an attacker-controlled or compromised WebSocket endpoint.

This is a regression specific to undici 8.1.0. The 6.25.0 line shipped the equivalent cumulative check from the start and is unaffected. The 7.x line never had the `maxPayloadSize` feature and is also unaffected.

## Patches

Upgrade to undici >= 8.5.0.

## Workarounds

No workaround is available. The fix must be applied through an upgrade.

msrc_CVE-2026-9675 — undici WebSocket client vulnerable to denial of service via cumulative fragment bypass

msrc_CVE-2026-9675

RHSA-2026:22380 — Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

undici: undici: Information disclosure and data integrity issues due to incorrect Socks5ProxyAgent connection routing undici: undici WebSocket client vulnerable to denial of service via cumulative fragment bypass undici: Undici: Information disclosure due to improper cache-control header parsing undici: undici: Man-in-the-Middle attack via ignored TLS options with SOCKS5 proxy brace-expansion: brace-expansion: Denial of Service due to excessive memory allocation when expanding large numeric ranges

UBUNTU-CVE-2026-9675

Affected: Ubuntu:24.04:LTS: node-undici, Ubuntu:25.10: node-undici, Ubuntu:26.04:LTS: node-undici

Impact: The undici WebSocket client enforces maxPayloadSize per-frame but does not enforce the cumulative size of fragmented uncompressed messages. A malicious WebSocket server can stream many small fragments that each pass per-frame validation but collectively exceed the configured limit, causing unbounded memory growth in the client process. The result is memory exhaustion and a denial of service. Affected applications are those using the undici WebSocket client (new WebSocket(...)) that can be induced to connect to an attacker-controlled or compromised WebSocket endpoint. This is a regression specific to undici 8.1.0. The 6.25.0 line shipped the equivalent cumulative check from the start and is unaffected. The 7.x line never had the maxPayloadSize feature and is also unaffected. Patches: Upgrade to undici >= 8.5.0. Workarounds: No workaround is available. The fix must be applied through an upgrade.

WID-SEC-W-2026-2618 — IBM App Connect Enterprise: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in IBM App Connect Enterprise ausnutzen, um Sicherheitsvorkehrungen zu umgehen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, und um Daten zu manipulieren.