#nodejs

GitHub will address weak authentication and overly permissive tokens in the NPM ecosystem, following high-profile threat campaigns like those involving Shai-Hulud malware.

GitHub on Monday announced that it will be changing its authentication and publishing options "in the near future" in response to a recent wave of supply chain attacks targeting the npm ecosystem, including the Shai-Hulud attack. This includes steps to address threats posed by token abuse and self-replicating malware by allowing local publishing with required two-factor authentication (2FA),

### Summary The lack of sanitization of URLs protocols in the `createLink.openLink` function enables the execution of arbitrary JavaScript code within the context of the parent page. ### Details https://github.com/FrontFin/mesh-web-sdk/blob/cf013b85ab95d64c63cbe46d6cb14695474924e7/packages/link/src/Link.ts#L441 The `createLink.openLink` function takes base64 encoded links, decodes them, and then sets the resulting string as the `src` attribute of an `iframe`. It’s important to note that the protocol part is not validated, so a payload, which is a valid URL, such as `javascript:alert(document.domain)//`, can be provided to the function. ### PoC 1. Extract [poc-mesh-web-sdk.zip](https://github.com/user-attachments/files/22223079/poc-mesh-web-sdk.zip) 2. Run `yarn install` and then `yarn start` 3. Paste this payload inside the input box: `amF2YXNjcmlwdDphbGVydCh3aW5kb3cucGFyZW50LmRvY3VtZW50LmJvZHkuZ2V0RWxlbWVudHNCeVRhZ05hbWUoImgyIikuaXRlbSgwKVsiaW5uZXJIVE1MIl0pLy8=` 4. Click on the _Ope...

### Impact An HTML injection vulnerability in plaintext e-mails generated by Mailgen has been discovered. Your project is affected if you make use of the `Mailgen.generatePlaintext(email);` method and pass in user-generated content. The issue has been discovered and reported by Edoardo Ottavianelli (@edoardottt). ### Patches The vulnerability has been patched in commit https://github.com/eladnava/mailgen/commit/741a0190ddae0f408b22ae3b5f0f4c3f5cf4f11d and released to `npm` in version `2.0.30`. ### Workarounds Strip all HTML tags yourself before passing any content into `Mailgen.generatePlaintext(email);`. Thanks to Edoardo Ottavianelli (@edoardottt) for discovering and reporting this vulnerability.

## Summary Authlib’s JWS verification accepts tokens that declare unknown critical header parameters (`crit`), violating RFC 7515 “must‑understand” semantics. An attacker can craft a signed token with a critical header (for example, `bork` or `cnf`) that strict verifiers reject but Authlib accepts. In mixed‑language fleets, this enables split‑brain verification and can lead to policy bypass, replay, or privilege escalation. ## Affected Component and Versions - Library: Authlib (JWS verification) - API: `authlib.jose.JsonWebSignature.deserialize_compact(...)` - Version tested: 1.6.3 - Configuration: Default; no allowlist or special handling for `crit` ## Details RFC 7515 (JWS) §4.1.11 defines `crit` as a “must‑understand” list: recipients MUST understand and enforce every header parameter listed in `crit`, otherwise they MUST reject the token. Security‑sensitive semantics such as token binding (e.g., `cnf` from RFC 7800) are often conveyed via `crit`. Observed behavior with Authlib 1...

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In the @digitalocean/do-markdownit package through 1.16.1 (in npm), the callout and fence_environment plugins perform .includes substring matching if allowedClasses or allowedEnvironments is a string (instead of an array).

This edition pulls the curtain aside to show the realities of the VPN Filter campaign. Joe reflects on the struggle to prevent burnout in a world constantly on fire.