# CVE-2026-109932: node-undici: undici is an HTTP client library for Node.js CVE-2026-109932 is fixed in 21 products on 1 platform, first by DEBIAN-CVE-2026-109932, released November 1, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-109932 - Priority: High - CVSS: 7.5 (high) - EPSS: 0.0032 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Oct 15, 2026 ## Description undici is an HTTP client library for Node.js. In versions 5.15.0 through 6.29.0, 7.0.0 through 7.30.0, and 8.0.0 through 8.12.1, its WebSocket client, including the bundled WebSocket exposed by Node.js, can be driven to exhaust process memory by a malicious or compromised WebSocket server. For every PING frame received, the client automatically writes a PONG response and ignores the backpressure signal from the socket write, so a server that streams small PING frames while never reading the client's PONGs makes the outbound write queue and heap grow without bound until the Node.js process runs out of memory and terminates. The attack is remote and unauthenticated, needs only a normal WebSocket connection, and is asymmetric, since small inbound PINGs produce a much larger retained outbound queue, with availability the only impact. The issue is fixed in undici 6.29.1, 7.30.1, and 8.12.2, which pause WebSocket frame parsing when the automatic PONG response hits socket backpressure and resume on drain, bounding the outbound queue, and users should upgrade to one of those versions or later. There is no workaround. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | node-undici Debian 14 | 8.12.2+dfsg+~cs3.2.3-1 | [DEBIAN-CVE-2026-109932](https://patchblox.com/security/data/fix/linux/debian-cve-2026-109932.md) | Nov 1, 2026 | | Linux | nodejs22 amzn 2023 | 1:22.23.4-1.amzn2023.0.1 | [ALAS2023-2026-3328](https://patchblox.com/security/data/fix/linux/alas2023-2026-3328.md) | Nov 7, 2026 | | Linux | nodejs22-debuginfo amzn 2023 | 1:22.23.4-1.amzn2023.0.1 | [ALAS2023-2026-3328](https://patchblox.com/security/data/fix/linux/alas2023-2026-3328.md) | Nov 7, 2026 | | Linux | nodejs22-debugsource amzn 2023 | 1:22.23.4-1.amzn2023.0.1 | [ALAS2023-2026-3328](https://patchblox.com/security/data/fix/linux/alas2023-2026-3328.md) | Nov 7, 2026 | | Linux | nodejs22-devel amzn 2023 | 1:22.23.4-1.amzn2023.0.1 | [ALAS2023-2026-3328](https://patchblox.com/security/data/fix/linux/alas2023-2026-3328.md) | Nov 7, 2026 | | Linux | nodejs22-docs amzn 2023 | 1:22.23.4-1.amzn2023.0.1 | [ALAS2023-2026-3328](https://patchblox.com/security/data/fix/linux/alas2023-2026-3328.md) | Nov 7, 2026 | | Linux | nodejs22-full-i18n amzn 2023 | 1:22.23.4-1.amzn2023.0.1 | [ALAS2023-2026-3328](https://patchblox.com/security/data/fix/linux/alas2023-2026-3328.md) | Nov 7, 2026 | | Linux | nodejs22-libs amzn 2023 | 1:22.23.4-1.amzn2023.0.1 | [ALAS2023-2026-3328](https://patchblox.com/security/data/fix/linux/alas2023-2026-3328.md) | Nov 7, 2026 | | Linux | nodejs22-libs-debuginfo amzn 2023 | 1:22.23.4-1.amzn2023.0.1 | [ALAS2023-2026-3328](https://patchblox.com/security/data/fix/linux/alas2023-2026-3328.md) | Nov 7, 2026 | | Linux | nodejs22-npm amzn 2023 | 1:10.9.9-1.22.23.4.1.amzn2023.0.1 | [ALAS2023-2026-3328](https://patchblox.com/security/data/fix/linux/alas2023-2026-3328.md) | Nov 7, 2026 | | Linux | nodejs24 amzn 2023 | 1:24.22.1-1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 | | Linux | nodejs24-debuginfo amzn 2023 | 1:24.22.1-1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 | | Linux | nodejs24-debugsource amzn 2023 | 1:24.22.1-1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 | | Linux | nodejs24-devel amzn 2023 | 1:24.22.1-1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 | | Linux | nodejs24-docs amzn 2023 | 1:24.22.1-1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 | | Linux | nodejs24-full-i18n amzn 2023 | 1:24.22.1-1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 | | Linux | nodejs24-libs amzn 2023 | 1:24.22.1-1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 | | Linux | nodejs24-libs-debuginfo amzn 2023 | 1:24.22.1-1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 | | Linux | nodejs24-npm amzn 2023 | 1:11.19.1-1.24.22.1.1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 | | Linux | v8-12.4-devel amzn 2023 | 3:12.4.254.21-1.22.23.4.1.amzn2023.0.1 | [ALAS2023-2026-3328](https://patchblox.com/security/data/fix/linux/alas2023-2026-3328.md) | Nov 7, 2026 | | Linux | v8-13.6-devel amzn 2023 | 3:13.6.233.17-1.24.22.1.1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 | --- Data as of 2026-11-10T01:44:33Z UTC. 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