Signal is active with 1 mentions in latest observed window
Immediate actions
Patch markdown-it linkify-it systems immediately
Recommended action window: Monitor and triage in normal cycle
NVD description
linkify-it is a links recognition library with full Unicode support. Prior to 5.0.1, LinkifyIt.prototype.match, the package's primary public API, has O(N²) algorithmic complexity for inputs containing many fuzzy links or emails because the JavaScript-level scan loop re-slices input and re-runs unanchored regex searches on progressively shorter tails. Any service that synchronously renders untrusted Markdown with linkify:true on a request hot path can inherit a worker-process denial of service triggerable by a tens-of-KB request body. This issue is fixed in version 5.0.1.
⚠️ Linux Red Hat Hardened Images alert: CVE-2026-48801 (CVSS 7.5)
Remote attackers could disrupt service or cause a denial of service.
Upgrade to a vendor-listed fixed release.
https://vulnipulse.com/advisories/linux-cve-2026-48801
#Linux#RedHatHardenedImages#CyberSecurity#CVE
Post summary
The tweet alerts about CVE-2026-48801 in Red Hat Hardened Images, warns of potential remote denial‑of‑service, and advises upgrading to the vendor’s fixed release; no proof of exploitation or PoC is referenced.
🚨 HIGH - linkify-it quadratic complexity DoS in LinkifyIt.match (CVE-2026-48801)
CVE-2026-48801 is a denial-of-service weakness in linkify-it, specifically in LinkifyIt.prototype.match when scanning text for URLs/emails (and it can cascade into consumers like markdown-it when linkify is enabled). The root cause is algorithmic complexity (quadratic O(N^2)) triggered by inputs with many “fuzzy” link/email candidates. An attacker can exploit this by submitting crafted untrusted text/Markdown containing repeated email-like strings (tens of KB is enough) to force excessive backtracking/work during link detection, with no special privileges beyond being able to supply content for rendering. Impact is high CPU usage that blocks single-threaded Node.js workers for seconds to tens of seconds, causing request timeouts and service-level denial of service.
👉 Affected: linkify-it (versions with vulnerable LinkifyIt.prototype.match; fix version not specified) | Upgrade to No fix yet - treat as suspicious
Post summary
CVE‑2026‑48801 introduces a quadratic‑complexity denial‑of‑service flaw in linkify‑it’s URL/email detection, leading to high CPU usage in Node.js applications; no patch is yet available and no evidence of active exploitation is reported.
