Affected: AlmaLinux:9: nodejs, AlmaLinux:9: nodejs-devel, AlmaLinux:9: nodejs-docs, AlmaLinux:9: nodejs-full-i18n, AlmaLinux:9: nodejs-libs, AlmaLinux:9: nodejs-nodemon, AlmaLinux:9: nodejs-packaging, AlmaLinux:9: nodejs-packaging-bundler, AlmaLinux:9: npm, AlmaLinux:9: v8-13.6-devel

Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language.

Security Fix(es):

* brace-expansion: Brace-expansion: Denial of Service due to exponential-time complexity (CVE-2026-13149) * tar: Node-tar: Denial of Service via malformed tar archive header (CVE-2026-59874) * tar: node-tar: Denial of Service via crafted gzip bomb (CVE-2026-59873)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Withdrawn by the publisher.

Affected: CleanStart: npm

Package npm version 11.18.0-r0 fixes 1 vulnerabilities: CVE-2026-13149

brace-expansion through 5.0.6 is vulnerable to denial of service. The expand() function exhibits exponential-time complexity in the number of consecutive non-expanding '{}' brace groups. An attacker who passes a crafted string to expand(), directly or transitively, can cause significant CPU consumption and event-loop blocking. The max option does not mitigate this, as it bounds the output size rather than the recursion work.

Affected: npm: brace-expansion

### Summary brace-expansion's expand() exhibits exponential-time - O(2ⁿ) - behavior in the number of consecutive non-expanding {} groups. A short, all-ASCII input (~90 bytes/30 groups) blocks the calling thread for minutes; a slightly longer input hangs it effectively indefinitely. Because the dominant consumers run on Node's single-threaded event loop, one small input can fully stall a worker/process.

In `expand_`, `post` is computed unconditionally at the top of the function, before the early-return branches that don't use it: ```js const post = m.post.length ? expand_(m.post, max, false) : ['']; // always recurses ... if (!isSequence && !isOptions) { if (m.post.match(/,(?!,).*\}/)) { str = m.pre + '{' + m.body + escClose + m.post; return expand_(str, max, true); // restart — `post` discarded } return [str]; } ```

For input like a{},{},…, the first {} is non-expanding, so control reaches the {a},b} rewrite branch - but `expand_` has already recursed into post over the entire remaining tail, only to throw the result away. Each level therefore spawns two recursive expansions over essentially the same remaining work: `T(n) = 2·T(n−1) ⇒ O(2ⁿ)`.

The max option does not mitigate this: max only bounds the output-building loops; neither the post recursion nor the rewrite recursion consults it. Measured on 5.0.6:

| groups (n) | input bytes | time | |---|---|---| | 20 | 60 | 130 ms | | 24 | 72 | 1.9 s | | 26 | 78 | 7.8 s | | 30 (PoC) | 90 | ~2 min |

### Pro…

python313-pytest-html-4.2.0-4.1 on GA media

brace-expansion: Brace-expansion: Denial of Service due to exponential-time complexity nodejs: Node.js: Denial of Service via unlimited HTTP/2 ORIGIN frames Node.js: Node.js: Trust-policy bypass due to hostname matching inconsistency nodejs: Node.js: Silent authority rebinding due to embedded-nul hostnames in TLS handling nodejs: Node.js: Certification validation bypass in TLS host verification nodejs: Node.js: Unauthorized file metadata modification nodejs: Node.js: Local server can be started without network permission via Permission API flaw js-yaml: js-yaml: Denial of Service via crafted YAML merge keys js-yaml: js-yaml: Denial of Service via quadratic CPU time parsing with merge keys js-yaml: js-yaml: Denial of Service via crafted YAML ordered-map document

Affected: Rocky Linux:9: nodejs, Rocky Linux:9: nodejs-nodemon, Rocky Linux:9: nodejs-packaging

Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language.

Security Fix(es):

* brace-expansion: Brace-expansion: Denial of Service due to exponential-time complexity (CVE-2026-13149)

* tar: Node-tar: Denial of Service via malformed tar archive header (CVE-2026-59874)

* tar: node-tar: Denial of Service via crafted gzip bomb (CVE-2026-59873)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Security update for Multi-Linux Manager Client Tools - Monitoring stack

Affected: Ubuntu:18.04:LTS: node-brace-expansion, Ubuntu:20.04:LTS: node-brace-expansion, Ubuntu:22.04:LTS: node-brace-expansion, Ubuntu:24.04:LTS: node-brace-expansion, Ubuntu:25.10: node-brace-expansion, Ubuntu:26.04:LTS: node-brace-expansion

brace-expansion through 5.0.6 is vulnerable to denial of service. The expand() function exhibits exponential-time complexity in the number of consecutive non-expanding '{}' brace groups. An attacker who passes a crafted string to expand(), directly or transitively, can cause significant CPU consumption and event-loop blocking. The max option does not mitigate this, as it bounds the output size rather than the recursion work.

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Ansible Automation Platform ausnutzen, um Sicherheitsmaßnahmen zu umgehen, Cross-Site-Scripting-Angriffe durchzuführen, Daten zu manipulieren, einen Denial-of-Service-Zustand auszulösen oder beliebigen Code auszuführen.