CVE-2026-56764

Aliases:GHSA-gq3j-xvxp-8hrfRHSA-2026:47618
Advisory lineage Upstream: 0 Downstream: 1
Downstream
RHSA-2026:47619
Deferred
Published: 15 Jul 2026, 11:25
Last modified:15 Jul 2026, 13:50

Vulnerability Summary

Overall Risk (default)
medium
25/100
CVSS Score
6.3 MEDIUM
v4.0 (cve.org)
EPSS Score
0.3% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

15 Jul 2026, 11:25
Published
Vulnerability first disclosed
15 Jul 2026, 13:50
Last Modified
Vulnerability information updated

Description

Hono before 4.11.10 contains a timing attack vulnerability in the basicAuth and bearerAuth middlewares due to non-constant-time string comparison in the timingSafeEqual function. Attackers can exploit early termination of string equality checks to infer valid credentials through precise timing measurements.

CVSS Metrics

  • v4.0•MEDIUM•Score: 6.3CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
  • v4.0•MEDIUM•Score: 6.3CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  • v3.1•LOW•Score: 3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Trends

Current EPSS score: 0.30%• Percentile: 23%

Techniques & Countermeasures

  • CWE-208•Observable Timing Discrepancy

    Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.

Affected Systems

  • hono•hono

    < 4.11.10

  • Npm•hono

    < 4.11.10

  • redhat•grafana13.1

    < 0:13.1.1-0.2.hum1

References (14)