Skip to main content
cvebuzz

CVE mentions, exploit signals, and PoC evidence in one fast public view.

CVE detail

CVE-2026-39831

The Verify() method for FIDO/U2F security key types ([email protected], [email protected]) did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior, return a "no-touch-required" extension in Permissions.Extensions from PublicKeyCallback.

CVSS 9.1 · CriticalBuzz score 37.9

Buzz score

Why this CVE is surfacing

Buzz score total 37.9

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 17.9 · diversity 20.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Mention score
17.9
5 evidence mentions in the snapshot
Diversity score
20.0
4 sources across 4 categories
KEV score
0.0
No KEV entry observed
OTX score
0.0
0 OTX pulses
PoC score
0.0
0 repos · best confidence N/A
Best PoC traction
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
0
within the 30d window
Peak daily
0
highest bucket

Evidence

Source links by recency

Newest mentions first
5 source links · newest first

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars
No public PoC repositories have been matched yet.

Related records

Similar CVEs

6 related CVEs with shared weakness or product evidence
  • CVE-2026-39833

    The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation promp…

    CVSS 9.1 · Critical
    6 mentions
  • CVE-2026-66477

    Unauthenticated Broken Access Control in Gillion <= 4.13 versions.

    CVSS 5.3 · Medium
    1 mention
  • CVE-2026-66442

    Subscriber Broken Access Control in YayPricing <= 3.5.6 versions.

    CVSS 5.4 · Medium
    1 mention
  • CVE-2026-65568

    Contributor Broken Access Control in Visual Composer Website Builder <= 45.15.0 versions.

    CVSS 5.0 · Medium
    1 mention
  • CVE-2026-65567

    Unauthenticated Broken Access Control in Event Tickets <= 5.29.0.1 versions.

    CVSS 5.3 · Medium
    1 mention
  • CVE-2026-65435

    Unauthenticated Broken Access Control in Thrive Leads Version <= 10.9.2 versions.

    CVSS 6.5 · Medium
    1 mention