Skip to main content

CVE detail

CVE-2026-42256

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. From versions 0.4.0 to before 0.4.24, 0.5.0 to before 0.5.14, and 0.6.0 to before 0.6.4, when authenticating a connection with SCRAM-SHA1 or SCRAM-SHA256, a hostile server can perform a computational denial-of-service attack on the client process by sending a big iteration count value. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

CVSS 6.0 · MediumBuzz score 32.0

Buzz score

Why this CVE is surfacing

Buzz score total 32.0

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 22.0 · diversity 10.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Mention score
22.0
8 evidence mentions in the snapshot
Diversity score
10.0
2 sources across 2 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
8 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-2025-43857

    Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.5.7, 0.4.20, 0.3.9, and 0.2.5, there is a possibility for denial of…

    CVSS 6.0 · Medium
  • CVE-2026-18362

    The IRIS web application in version 2.4.26 and possibly others does not protect its user authentication against brute-force attacks.

    CVSS 5.9 · Medium
    1 mention
  • CVE-2026-16971

    The IRIS web application in version 2.4.26 and possibly others does not protect its MFA validation against brute-force attacks.

    CVSS 5.9 · Medium
    1 mention
  • CVE-2026-67437

    OliveTin gives access to predefined shell commands from a web interface. From 3000.0.0 until 3000.17.0, the service/internal/auth/otoauth2/restapi_auth_oauth2.go OAuth2 login hand…

    CVSS 7.5 · High
  • CVE-2026-67432

    MCP Ruby SDK is the official Ruby SDK for Model Context Protocol servers and clients. Prior to 0.23.0, MCP::Server::Transports::StreamableHTTPTransport in the mcp gem reads and pa…

    CVSS 7.5 · High
    3 mentions
  • CVE-2026-67430

    MCP Ruby SDK is the official Ruby SDK for Model Context Protocol servers and clients. Prior to 0.23.0, MCP::Server::Transports::StreamableHTTPTransport in the mcp gem does not exp…

    CVSS 5.3 · Medium
    3 mentions