Security Research

Security Blog

Page 6

high3 min

bookDir() Path Traversal via Unsanitized bookId Parameter

The `bookDir()` function accepted unsanitized `bookId` values derived from user-created book titles, enabling path traversal attacks through `../` sequences. A fix was applied that validates the identifier using `path.basename()` and throws on mismatch, ensuring all resolved paths remain within `LIBRARY_DIR`.

#path-traversal#javascript#nodejs+2 more
A
anupamme
Sep 28, 2026
high3 min

boardcards.js parseArgs() SSRF: --board Flag Reaches Metadata IPs

The `parseArgs()` function in boardcards.js accepted a user-controlled `--board` command-line argument and passed it directly to fetch() calls without validating the URL scheme or hostname. An attacker could supply `http://169.254.169.254/latest/meta-data/` or other internal addresses to extract cloud credentials or scan internal networks.

#ssrf#nodejs#command-line+3 more
A
anupamme
Sep 28, 2026
high8 min

Unbounded Map in createLoginRateLimiter Exhausts API Memory

The console API's `createLoginRateLimiter` and `createMutationRateLimiter` stored one `Map` entry per client key with no upper bound and no expiry sweep, so an attacker rotating source addresses or identifiers could grow those maps until the Node process hit an out-of-memory crash. The fix introduces a `maxTrackedKeys` option (default 5000), a `trackedEntryLimit` sanitizer, and an `evictOldestIfFull` helper that drops the oldest tracked key while protecting the shared global counter. The rate li

#security#cwe-400#denial-of-service+3 more
A
anupamme
Sep 28, 2026
high4 min

nanoid 3.3.11 Integer Overflow: Predictable ID Generation

An integer overflow in nanoid 3.3.11's internal randomness generation causes the library to fall back to predictable ID sequences, undermining the cryptographic guarantees of its supposedly unguessable identifiers. The fix upgrades the dependency tree to patched versions 3.3.12 or 5.1.11.

#cryptography#nanoid#npm+4 more
A
anupamme
Sep 28, 2026
critical6 min

BFF Proxy QR Code Endpoint Prototype Pollution via Unvalidated JSON

A critical prototype pollution vulnerability in a backend-for-frontend (BFF) proxy endpoint allowed attackers to inject malicious properties into the JavaScript Object prototype by crafting JSON requests with forbidden keys. This could compromise application behavior across all objects. The fix adds explicit key validation to reject payloads containing `__proto__`, `constructor`, or `prototype`.

#injection#javascript#prototype-pollution+2 more
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anupamme
Sep 28, 2026
high3 min

fetch() with Automatic Redirects Leaks HTTPS Trust to api.tomys.top

The `withProxy()` fetch wrapper allowed automatic HTTP redirects from `api.tomys.top`, trusting the external API's domain integrity without validating final destinations. A compromised or malicious redirect response could send users to attacker-controlled phishing sites while maintaining HTTPS protocol and hostname checks that falsely appear secure.

#ssrf#javascript#fetch-api+3 more
A
anupamme
Sep 28, 2026
high4 min

Anthropic API Adapter Prototype Pollution in parseToolCallInput

The `parseToolCallInput` function in the Anthropic API adapter used `JSON.parse` without protecting against prototype pollution keys. An attacker who could manipulate API responses—through a man-in-the-middle attack, compromised Codex backend, or DNS spoofing—could inject `__proto__`, `constructor`, or `prototype` properties to pollute JavaScript's Object prototype and affect extension runtime behavior.

#deserialization#typescript#anthropic-api+3 more
A
anupamme
Sep 27, 2026
high4 min

js-yaml 4.3.1 Denial of Service: Malformed Input Hangs YAML Parser

A denial of service vulnerability in js-yaml versions 4.3.1 and earlier allows attackers to hang the YAML parser indefinitely by providing specially crafted malformed input. The fix, released in versions 4.3.2 and 3.15.2, patches the parsing logic to prevent unbounded processing. Upgrading is recommended for all applications parsing untrusted YAML data.

#security#denial-of-service#javascript+3 more
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anupamme
Sep 27, 2026
high4 min

Express `app.get('*')` Wildcard Handler Path Traversal in watch.js

A first-party Express server's wildcard route handler used `req.url.indexOf('font.woff2')` to gate access to a font file, allowing attackers to bypass the substring check with crafted paths. The fix replaces the catch-all handler with explicit route registration.

#path-traversal#express#javascript+3 more
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anupamme
Sep 27, 2026
high7 min

CVE-2026-54290: hono cors() Reflects Any Origin With Credentials

The `hono` CORS middleware, as resolved in this service at 4.12.8, reflected the caller's `Origin` header back in `Access-Control-Allow-Origin` while also emitting `Access-Control-Allow-Credentials: true` whenever the `origin` option was left at its `'*'` default. That combination makes any website a trusted origin for credentialed cross-origin reads. The dependency range was raised from `^4.7.1` to `^4.13.5`, moving the installed copy from 4.12.8 to 4.13.5.

#authorization#cors#hono+3 more
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anupamme
Sep 26, 2026
high4 min

innerHTML Injection in postAlert(): Glitch.me Data Renders Unsanitized

The `postAlert()` function fetched alert data from a Glitch.me endpoint and injected it directly into the DOM using `innerHTML`, enabling arbitrary JavaScript execution if that external source was compromised. The fix replaces the HTML string concatenation with safe DOM API methods: `document.createTextNode()` for content and `addEventListener()` for event handlers, eliminating the injection vector entirely.

#xss#javascript#dom+4 more
A
anupamme
Sep 26, 2026
critical3 min

Updater.parseUpdate() CWE-494: Unsigned Metadata Download

The parseUpdate function in the Updater component extracted download URLs from remote server responses without cryptographic verification, enabling supply chain attacks via compromised or spoofed update servers. The fix adds strict URL validation requiring HTTPS and a trusted hostname before accepting any update metadata.

#security#code-integrity#supply-chain+3 more
A
anupamme
Sep 26, 2026