---
title: "CVE-2025-64767: @hpke/core reuses AEAD nonces"
url: https://erroneo.us/security/cve/CVE-2025-64767/
description: "CVE-2025-64767 (@hpke/core (npm)): hpke-js is a Hybrid Public Key Encryption (HPKE) module built on top of Web Cryptography API. Prior to version 1.7.5, the…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-11-21
date_modified: 2025-11-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-64767"
kev: false
cvss: 9.1
epss: 0.00212
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-64767: @hpke/core reuses AEAD nonces

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.2% , percentile 11: FIRST’s model estimates a 0.2% chance of exploitation activity in the next 30 days, higher than 11% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes @hpke/core (npm) <= 1.7.4, fixed in 1.7.5 . Check your lockfile, including transitive dependencies.

## What it is

hpke-js is a Hybrid Public Key Encryption (HPKE) module built on top of Web Cryptography API. Prior to version 1.7.5, the public SenderContext Seal() API has a race condition which allows for the same AEAD nonce to be re-used for multiple Seal() calls. This can lead to complete loss of Confidentiality and Integrity of the produced messages. This issue has been patched in version 1.7.5.

## Affected packages

- npm `@hpke/core` <= 1.7.4 → fixed: 1.7.5

## Affected products (CVE record)

- dajiaji hpke-js: < 1.7.5

## Severity

- GitHub_M CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`
- GitHub CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 0.21% probability of exploitation activity in the next 30 days; percentile 11.

## Sources

- [GitHub Advisory GHSA-73g8-5h73-26h4](https://github.com/advisories/GHSA-73g8-5h73-26h4)
- [CVE.org record CVE-2025-64767](https://www.cve.org/CVERecord?id=CVE-2025-64767)
- [NVD entry CVE-2025-64767](https://nvd.nist.gov/vuln/detail/CVE-2025-64767)
- [github.com](https://github.com/dajiaji/hpke-js/security/advisories/GHSA-73g8-5h73-26h4)
- [github.com](https://github.com/dajiaji/hpke-js/commit/94a767c9b9f37ce48d5cd86f7017d8cacd294aaf)
- [github.com](https://github.com/dajiaji/hpke-js/blob/b7fd3592c7c08660c98289d67c6bb7f891af75c4/packages/core/src/senderContext.ts#L22-L34)

---
Source page: https://erroneo.us/security/cve/CVE-2025-64767/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt