Is CVE-2025-64767 actively exploited?

No active exploitation of CVE-2025-64767 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-64767 be exploited remotely?

Yes. CVE-2025-64767 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-64767?

CVE-2025-64767 has a CVSS score of 9.1 (CRITICAL).

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CRITICAL

CVE-2025-64767

CWE-323Published: November 21, 2025· Updated: Jun 17, 2026

9.1

CVSS v3.1

Official Description

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.

NVD Source

Risk Analysis

This critical vulnerability in hpke-js, prior to version 1.7.5, involves a race condition in the SenderContext Seal() API that reuses AEAD nonces. This can lead to a complete loss of confidentiality and integrity for encrypted messages. The CVSS score of 9.1 indicates extreme urgency, though no EPSS score is available to gauge exploitation likelihood.

No public exploit is known for this vulnerability, and it is not listed in CISA's KEV catalog. The flaw is remotely exploitable over the network with low attack complexity, making it a significant concern.

Recommended Action

Upgrade hpke-js to version 1.7.5 or later to resolve this race condition. Review and re-encrypt any sensitive data that may have been processed by affected versions.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2025-64767 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 9.1.