Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
Impact: A bad regular expression is generated any time you have multiple sequential optional groups (curly brace syntax), such as `{a}{b}{c}:z`. The generated regex grows exponentially with the number of groups, causing denial of service. Patches: Fixed in version 8.4.0. Workarounds: Limit the number of sequential optional groups in route patterns. Avoid passing user-controlled input as route patterns.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
STABLE
If you run products in this scope, you should treat this CVE as relevant to your environment.
| Date | Total | Labels |
|---|
| 2026-03-26 | 2 | General1Patch1 |
| 2026-03-31 | 1 | Disclosure1 |
| 2026-06-01 | 1 | Patch1 |
🚨 High-severity security fix in path-to-regexp@8.4.0 just released! Patches CVE-2026-4926 — path-to-regexp vulnerable to Denial of Service via sequential optional groups https://github.com/pillarjs/path-to-regexp/security/advisories/GHSA-j3q9-mxjg-w52f
Post summary
A high‑severity patch is available for CVE‑2026‑4926, fixing a Denial of Service vulnerability in path-to-regexp through sequential optional groups.
@mem0ai More CVE remediations → langsmith → ^0.6.0 (CVE-2026-45134) → minimatch → ^3.1.3 / ^5.1.8 / ^9.0.7 (3 CVEs) → picomatch → ^2.3.2 (CVE-2026-33671) → path-to-regexp → ^8.4.0 (CVE-2026-4926) → glob → ^10.5.0 (CVE-2025-64756)
Post summary
The tweet provides updated package versions that remediate several CVEs, focusing on patching rather than exploitation or vulnerability details.
A Denial of Service vulnerability (CVE-2026-4926) affects the `path-to-regexp` library. Crafted input can lead to service unavailability. Monitor for official fixes. #DoS #javascript #infosec https://www.pulsepatch.io/posts/cve-2026-4926-path-to-regexp-denial-of-service
Post summary
The tweet announces a newly disclosed DoS vulnerability (CVE‑2026‑4926) in the path‑to‑regexp JavaScript library that can be triggered by crafted input, urging users to watch for vendor patches.
CVE-2026-4926 Impact: A bad regular expression is generated any time you have multiple sequential optional groups (curly brace syntax), such as `{a}{b}{c}:z`. The generated regex gr… https://www.cve.org/CVERecord?id=CVE-2026-4926
Post summary
The post merely outlines the nature of CVE-2026-4926—an issue where multiple optional regex groups create a problematic expression—without providing any PoC, exploit, patch, or evidence of real‑world use.
1 of 1 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | pillarjs | path-to-regexp | - | node.js | - |