CVE-2025-45766

Disputed JWS weakness from application-selected short keys

Published Aug 6, 2025 · Updated Aug 17, 2025

Weak cryptography in POCO 1.14.1 and earlier is reported to expose JWS protections when applications select short HMAC or RSA keys. The report names the JWS implementation but identifies no library operation that generates weak keys; it flags the lengths of application-supplied HMAC and RSA keys. POCO disputes the flaw because key selection belongs to consuming applications, so exposure requires an application to configure undersized keys and no library-specific compromise has been demonstrated.

CVSS severity7.5
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak cryptography in POCO 1.14.1 and earlier is reported to expose JWS protections when applications select short HMAC or RSA keys. The report names the JWS implementation but identifies no library operation that generates weak keys; it flags the lengths of application-supplied HMAC and RSA keys. POCO disputes the flaw because key selection belongs to consuming applications, so exposure requires an application to configure undersized keys and no library-specific compromise has been demonstrated.

The record

CVE
CVE-2025-45766
Published
Aug 6, 2025
Updated
Aug 17, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-327
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 17, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-327Use of a Broken or Risky Cryptographic Algorithm

Public exploit references

No public exploit references are available in this record.

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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