CVE catalog
CVE-2026-21637
nodejs: CVE-2026-21637
- Severity
- Medium · CVSS 5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.12% · Oct 25, 2026
A flaw in Node.js TLS error handling allows remote attackers to crash or exhaust resources of a TLS server when `pskCallback` or `ALPNCallback` are in use. Synchronous exceptions thrown during these callbacks bypass standard TLS error handling paths (tlsClientError and error), causing either immediate process termination or silent file descriptor leaks that eventually lead to denial of service. Because these callbacks process attacker-controlled input during the TLS handshake, a remote client can repeatedly trigger the issue. This vulnerability affects TLS servers using PSK or ALPN callbacks across Node.js versions where these callbacks throw without being safely wrapped.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | nodejs | sid | 24.22.1+dfsg+~cs24.19.2-1 | fixed |
| Debian | nodejs | forky | 24.21.0+dfsg+~cs24.13.4-1 | fixed |
| Debian | nodejs | trixie | 20.19.2+dfsg-1+deb13u2 | fixed |
| Debian | nodejs | trixie-security | 20.19.2+dfsg-1+deb13u3 | fixed |
| Debian | nodejs | bookworm | 18.20.4+dfsg-1~deb12u2 | fixed |
| Debian | nodejs | bookworm-security | 18.20.4+dfsg-1~deb12u3 | fixed |
| Alpine | nodejs | 3.21 | 22.22.2-r0 | fixed |
| Alpine | nodejs | 3.22 | 22.22.0-r0 | fixed |
| Alpine | nodejs | 3.22 | 22.22.2-r0 | fixed |
| Alpine | nodejs | 3.23 | 24.14.1-r0 | fixed |
| Alpine | nodejs | 3.24 | 24.14.1-r0 | fixed |
| Ubuntu | nodejs | pro | 12.22.5~dfsg-5ubuntu1 | vulnerable |
| Ubuntu | nodejs | pro | 12.22.7~dfsg-2ubuntu1 | vulnerable |
| Ubuntu | nodejs | pro | 12.22.7~dfsg-2ubuntu3 | vulnerable |
| Ubuntu | nodejs | pro | 12.22.9~dfsg-1ubuntu2 | vulnerable |
| Ubuntu | nodejs | pro | 12.22.9~dfsg-1ubuntu3 | vulnerable |
| Ubuntu | nodejs | pro | 12.22.9~dfsg-1ubuntu3.1 | vulnerable |
| Ubuntu | nodejs | pro | 12.22.9~dfsg-1ubuntu3.2 | vulnerable |
| Ubuntu | nodejs | pro | 12.22.9~dfsg-1ubuntu3.3 | vulnerable |
| Ubuntu | nodejs | pro | 12.22.9~dfsg-1ubuntu3.4 | vulnerable |
| Ubuntu | nodejs | pro | 12.22.9~dfsg-1ubuntu3.5 | vulnerable |
| Ubuntu | nodejs | pro | 12.22.9~dfsg-1ubuntu3.6 | vulnerable |
| Ubuntu | nodejs | pro | 12.22.9~dfsg-1ubuntu3.6+esm2 | vulnerable |
| Ubuntu | nodejs | 24.04 | 18.13.0+dfsg1-1ubuntu2 | vulnerable |
| Ubuntu | nodejs | 24.04 | 18.19.1+dfsg-2ubuntu4 | vulnerable |
| Ubuntu | nodejs | 24.04 | 18.19.1+dfsg-6ubuntu1 | vulnerable |
| Ubuntu | nodejs | 24.04 | 18.19.1+dfsg-6ubuntu2 | vulnerable |
| Ubuntu | nodejs | 24.04 | 18.19.1+dfsg-6ubuntu5 | vulnerable |
| Ubuntu | nodejs | 25.10 | 20.18.1+dfsg-1ubuntu2 | vulnerable |
| Ubuntu | nodejs | 25.10 | 20.19.2+dfsg-1 | vulnerable |
| Ubuntu | nodejs | 25.10 | 20.19.4+dfsg-1 | vulnerable |
| Ubuntu | nodejs | 26.04 | 20.19.4+dfsg-1 | vulnerable |
| Ubuntu | nodejs | 26.04 | 20.19.5+dfsg+~cs20.19.12-4 | vulnerable |
| Ubuntu | nodejs | 26.04 | 22.21.1+dfsg+~cs22.19.0-6ubuntu4 | vulnerable |
| Ubuntu | nodejs | 26.04 | 22.22.0+dfsg+~cs22.19.6-1ubuntu2 | vulnerable |
| Ubuntu | nodejs | 26.04 | 22.22.0+dfsg+~cs22.19.13-2ubuntu1 | vulnerable |
| Ubuntu | nodejs | 26.04 | 22.22.1+dfsg+~cs22.19.15-1ubuntu1 | vulnerable |
| Suse | nodejs22 | linux enterprise server 15 sp6-ltss | 22.22.2-150600.13.15.1 | fixed |
| Suse | nodejs22 | linux enterprise server for sap applications 15 sp6 | 22.22.2-150600.13.15.1 | fixed |
| Suse | nodejs22 | linux enterprise module for web and scripting 15 sp7 | 22.22.2-150700.3.9.1 | fixed |
| Suse | nodejs20 | linux enterprise server 15 sp6-ltss | 20.20.2-150600.3.18.1 | fixed |
| Suse | nodejs20 | linux enterprise server for sap applications 15 sp6 | 20.20.2-150600.3.18.1 | fixed |
| Suse | nodejs20 | linux enterprise high performance computing 15 sp5-espos | 20.20.2-150500.11.27.1 | fixed |
| Suse | nodejs20 | linux enterprise high performance computing 15 sp5-ltss | 20.20.2-150500.11.27.1 | fixed |
| Suse | nodejs20 | linux enterprise server 15 sp5-ltss | 20.20.2-150500.11.27.1 | fixed |
| Suse | nodejs20 | linux enterprise server for sap applications 15 sp5 | 20.20.2-150500.11.27.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | nodejs | source | sid | 22.22.2+dfsg+~cs22.19.15-1 | not yet assigned | Not reported | Not reported |
| Debian | nodejs | source | forky | 22.22.2+dfsg+~cs22.19.15-1 | not yet assigned | Not reported | Not reported |
| Debian | nodejs | source | trixie | 20.19.2+dfsg-1+deb13u2 | not yet assigned | Not reported | Not reported |
| Debian | nodejs | source | bookworm | 18.20.4+dfsg-1~deb12u2 | not yet assigned | Not reported | Not reported |
| Alpine | nodejs | apk | 3.21 | 22.22.2-r0 | Not reported | ALPINE-CVE-2026-21637 | Not reported |
| Alpine | nodejs | apk | 3.22 | 22.22.0-r0 | Not reported | ALPINE-CVE-2026-21637 | Not reported |
| Alpine | nodejs | apk | 3.22 | 22.22.2-r0 | Not reported | ALPINE-CVE-2026-21637 | Not reported |
| Alpine | nodejs | apk | 3.23 | 24.14.1-r0 | Not reported | ALPINE-CVE-2026-21637 | Not reported |
| Alpine | nodejs | apk | 3.24 | 24.14.1-r0 | Not reported | ALPINE-CVE-2026-21637 | Not reported |
| Suse | nodejs22 | rpm | linux enterprise server 15 sp6-ltss | 22.22.2-150600.13.15.1 | Not reported | SUSE-SU-2026:1509-1 | Not reported |
| Suse | nodejs22 | rpm | linux enterprise server for sap applications 15 sp6 | 22.22.2-150600.13.15.1 | Not reported | SUSE-SU-2026:1509-1 | Not reported |
| Suse | nodejs22 | rpm | linux enterprise module for web and scripting 15 sp7 | 22.22.2-150700.3.9.1 | Not reported | SUSE-SU-2026:1478-1 | Not reported |
| Suse | nodejs20 | rpm | linux enterprise server 15 sp6-ltss | 20.20.2-150600.3.18.1 | Not reported | SUSE-SU-2026:1363-1 | Not reported |
| Suse | nodejs20 | rpm | linux enterprise server for sap applications 15 sp6 | 20.20.2-150600.3.18.1 | Not reported | SUSE-SU-2026:1363-1 | Not reported |
| Suse | nodejs20 | rpm | linux enterprise high performance computing 15 sp5-espos | 20.20.2-150500.11.27.1 | Not reported | SUSE-SU-2026:1371-1 | Not reported |
| Suse | nodejs20 | rpm | linux enterprise high performance computing 15 sp5-ltss | 20.20.2-150500.11.27.1 | Not reported | SUSE-SU-2026:1371-1 | Not reported |
| Suse | nodejs20 | rpm | linux enterprise server 15 sp5-ltss | 20.20.2-150500.11.27.1 | Not reported | SUSE-SU-2026:1371-1 | Not reported |
| Suse | nodejs20 | rpm | linux enterprise server for sap applications 15 sp5 | 20.20.2-150500.11.27.1 | Not reported | SUSE-SU-2026:1371-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libnode108]Fixed
Source package: [nodejs]
Details (4)
18.20.4+dfsg-1~deb12u2· amd64 · bookwormFixed · Fixed:
18.20.4+dfsg-1~deb12u2dsa · nodejs · debian · bookworm; dsa · nodejs · debian · 12
18.20.4+dfsg-1~deb12u2· arm64 · bookwormFixed · Fixed:
18.20.4+dfsg-1~deb12u2dsa · nodejs · debian · bookworm; dsa · nodejs · debian · 12
18.20.4+dfsg-1~deb12u2· amd64 · bookworm-securityFixed · Fixed:
18.20.4+dfsg-1~deb12u2dsa · nodejs · debian · bookworm; dsa · nodejs · debian · 12
18.20.4+dfsg-1~deb12u2· arm64 · bookworm-securityFixed · Fixed:
18.20.4+dfsg-1~deb12u2dsa · nodejs · debian · bookworm; dsa · nodejs · debian · 12
- [libnode-dev]Fixed
Source package: [nodejs]
Details (4)
18.20.4+dfsg-1~deb12u2· amd64 · bookwormFixed · Fixed:
18.20.4+dfsg-1~deb12u2dsa · nodejs · debian · bookworm; dsa · nodejs · debian · 12
18.20.4+dfsg-1~deb12u2· arm64 · bookwormFixed · Fixed:
18.20.4+dfsg-1~deb12u2dsa · nodejs · debian · bookworm; dsa · nodejs · debian · 12
18.20.4+dfsg-1~deb12u2· amd64 · bookworm-securityFixed · Fixed:
18.20.4+dfsg-1~deb12u2dsa · nodejs · debian · bookworm; dsa · nodejs · debian · 12
18.20.4+dfsg-1~deb12u2· arm64 · bookworm-securityFixed · Fixed:
18.20.4+dfsg-1~deb12u2dsa · nodejs · debian · bookworm; dsa · nodejs · debian · 12
- [nodejs]Fixed
Details (4)
18.20.4+dfsg-1~deb12u2· amd64 · bookwormFixed · Fixed:
18.20.4+dfsg-1~deb12u2dsa · nodejs · debian · bookworm; dsa · nodejs · debian · 12
18.20.4+dfsg-1~deb12u2· arm64 · bookwormFixed · Fixed:
18.20.4+dfsg-1~deb12u2dsa · nodejs · debian · bookworm; dsa · nodejs · debian · 12
18.20.4+dfsg-1~deb12u2· amd64 · bookworm-securityFixed · Fixed:
18.20.4+dfsg-1~deb12u2dsa · nodejs · debian · bookworm; dsa · nodejs · debian · 12
18.20.4+dfsg-1~deb12u2· arm64 · bookworm-securityFixed · Fixed:
18.20.4+dfsg-1~deb12u2dsa · nodejs · debian · bookworm; dsa · nodejs · debian · 12
- [nodejs-doc]Fixed
Source package: [nodejs]
Details (4)
18.20.4+dfsg-1~deb12u2· all · bookwormFixed · Fixed:
18.20.4+dfsg-1~deb12u2dsa · nodejs · debian · bookworm; dsa · nodejs · debian · 12
18.20.4+dfsg-1~deb12u2· all · bookwormFixed · Fixed:
18.20.4+dfsg-1~deb12u2dsa · nodejs · debian · bookworm; dsa · nodejs · debian · 12
18.20.4+dfsg-1~deb12u2· all · bookworm-securityFixed · Fixed:
18.20.4+dfsg-1~deb12u2dsa · nodejs · debian · bookworm; dsa · nodejs · debian · 12
18.20.4+dfsg-1~deb12u2· all · bookworm-securityFixed · Fixed:
18.20.4+dfsg-1~deb12u2dsa · nodejs · debian · bookworm; dsa · nodejs · debian · 12
[Debian 13 (Trixie)]
- [libnode115]Fixed
Source package: [nodejs]
Details (5)
20.19.2+dfsg-1+deb13u2· amd64 · trixieFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
20.19.2+dfsg-1+deb13u2· arm64 · trixieFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
20.19.2+dfsg-1+deb13u2· amd64 · trixie-security · Historical versionFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
20.19.2+dfsg-1+deb13u2· arm64 · trixie-securityFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
20.19.2+dfsg-1+deb13u3· amd64 · trixie-securityFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
- [libnode-dev]Fixed
Source package: [nodejs]
Details (5)
20.19.2+dfsg-1+deb13u2· amd64 · trixieFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
20.19.2+dfsg-1+deb13u2· arm64 · trixieFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
20.19.2+dfsg-1+deb13u2· amd64 · trixie-security · Historical versionFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
20.19.2+dfsg-1+deb13u2· arm64 · trixie-securityFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
20.19.2+dfsg-1+deb13u3· amd64 · trixie-securityFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
- [nodejs]Fixed
Details (5)
20.19.2+dfsg-1+deb13u2· amd64 · trixieFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
20.19.2+dfsg-1+deb13u2· arm64 · trixieFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
20.19.2+dfsg-1+deb13u2· amd64 · trixie-security · Historical versionFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
20.19.2+dfsg-1+deb13u2· arm64 · trixie-securityFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
20.19.2+dfsg-1+deb13u3· amd64 · trixie-securityFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
- [nodejs-doc]Fixed
Source package: [nodejs]
Details (5)
20.19.2+dfsg-1+deb13u2· all · trixieFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
20.19.2+dfsg-1+deb13u2· all · trixieFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
20.19.2+dfsg-1+deb13u2· all · trixie-securityFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
20.19.2+dfsg-1+deb13u2· all · trixie-security · Historical versionFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
20.19.2+dfsg-1+deb13u3· all · trixie-securityFixed · Fixed:
20.19.2+dfsg-1+deb13u2dsa · nodejs · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_4248-1.json]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-21637]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-21637]
- [https://osv.dev/vulnerability/DSA-6183-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:1363-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:1371-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:1478-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:1509-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-21637]
- [https://security-tracker.debian.org/tracker/CVE-2026-21637]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21637.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1194.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]