Pakistan’s National Cyber Emergency Response Team (National CERT, the federal cyber-incident unit) has told public agencies and lenders that ten separate defects in Node.js — a common engine for building websites and APIs — can expose systems until operators install the vendor’s October 2026 repairs.
Four of the defects sit in the high-severity band, three are medium and three are low. Taken together they can let an attacker run their own commands on a server, scramble memory, bypass access rules or weaken encrypted sessions. The advisory covers the 22, 24 and 26 release lines. The Node.js Project published repaired packages on 21 October 2026. National CERT warns that ministries, banks, custodians of essential digital systems and any other body shipping Node.js apps may be in scope.
Why the Brotli flaw matters
One of the most serious issues, tracked as CVE-2026-111497, is an out-of-bounds write in Node.js’s Brotli decompression component. Attackers could exploit it by sending specially crafted compressed data, potentially executing code, crashing applications or reading process memory.
Other listed weaknesses could allow DNS manipulation, improper TLS certificate validation, unauthorized HTTP responses, predictable cryptographic identifiers, and access to restricted filesystem locations. National CERT flagged internet-facing services, API gateways, backend systems, cloud-hosted applications, containers and CI/CD pipelines as areas needing particular attention.
Although widespread active exploitation has not been established, researchers have demonstrated remote code execution against an official Node.js build, and proof-of-concept code for memory corruption has also been published.
What operators should do
National CERT has directed organisations to upgrade affected systems to Node.js versions 22.23.4, 24.22.1 and 26.12.1 or later, and to inventory Node.js installs across servers, cloud platforms, development environments and third-party applications.
Priority should go to apps that process untrusted Brotli-compressed data. Updates should come only from the official Node.js website or trusted package repositories. The advisory also recommends strict hostname validation, rejecting malformed hostnames and ambiguous IP address representations, and maintaining TLS certificate verification, including steps that address the compromised eMudhra intermediate certification authority.
Teams should watch for unexpected application crashes, memory faults, unusual processes launched by Node.js services, suspicious outbound connections and unauthorized filesystem access. Container isolation, network segmentation, restricted privileges and updated certificate trust stores are listed as further defences. Temporary measures can reduce exposure but cannot replace installing the fixed builds.
If something looks wrong
Organisations that detect suspicious activity or possible exploitation have been told to activate incident-response procedures, preserve application and network logs, isolate affected systems where necessary, install security patches, and report through National CERT’s incident reporting portal, email or designated contact number.
Aasan alfaaz mein
National CERT ne Node.js mein 10 security flaws ki warning di hai. Yeh flaws ministries, banks aur critical systems ko remote code execution aur memory corruption ke khatre mein daal sakte hain. Node.js 22, 24 aur 26 lines affected hain; patches 21 October 2026 ko aaye. Operators ko 22.23.4, 24.22.1 ya 26.12.1 (ya newer) lagana chahiye aur shak ki surat mein National CERT ko report karna chahiye.
