CVE-2025-64767Public exploitNetwork attack vector

Message disclosure and forgery via AEAD nonce reuse

Published Nov 21, 2025 · Updated Nov 21, 2025

AEAD nonce reuse in dajiaji hpke-js before 1.7.5 allows remote attackers to disclose or forge messages through concurrent Seal() calls. SenderContextImpl computes a nonce from its sequence number, awaits asynchronous encryption, and increments the sequence only afterward, so overlapping calls use the same nonce. Exploitation requires two Seal() operations to overlap on one sender context; the reused nonce breaks confidentiality and integrity for the resulting ciphertexts.

CVSS severity9.1
Critical
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

AEAD nonce reuse in dajiaji hpke-js before 1.7.5 allows remote attackers to disclose or forge messages through concurrent Seal() calls. SenderContextImpl computes a nonce from its sequence number, awaits asynchronous encryption, and increments the sequence only afterward, so overlapping calls use the same nonce. Exploitation requires two Seal() operations to overlap on one sender context; the reused nonce breaks confidentiality and integrity for the resulting ciphertexts.

The record

CVE
CVE-2025-64767
Published
Nov 21, 2025
Updated
Nov 21, 2025
Vendor
dajiaji
Product
hpke-js
Classifications
CWE-323
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.7.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

dajiaji · hpke-jsversion=< 1.7.5

Published CVSS scores

9.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-323Reusing a Nonce, Key Pair in Encryption

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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