cve.bz

CVE-2026-129118 C-Kermit 8.0.200 before 11.1.515 Improper Certificate Hostname Matching via dNSName_cmp

7.6 high

High (7.6) in openkermit c-kermit.

On this page
C-Kermit 8.0.200 before 11.1.515 contains an improper certificate hostname validation vulnerability that allows attackers to impersonate hosts by abusing wildcard matching in dNSName_cmp() in ck_ssl.c. Attackers holding a trusted certificate with over-matching names containing asterisks, question marks, brackets, or empty labels can intercept credentials and data over Telnet, FTP, and HTTP TLS connections.

Severity

CVSS 4.0

7.6 high
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

6.8 medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
CWE
CWE-297 Improper Validation of Certificate with Host Mismatch
OWASP Top 10
A07:2025 Authentication Failures
Published
Modified
Assigned by
VulnCheck (CNA)
NVD analysis
Deferred: the NVD does not plan to analyze it
Record from
the NVD, synced

Ask an AI about this CVE

ChatGPTClaudeGoogle AI Mode

Show the promptExplain CVE-2026-129118 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-129118?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-129118?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-129118 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.

Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.

Badge for a README or a site

CVE-2026-129118

An image that stays current: it is drawn from the data each time it is fetched (a host that proxies images, as GitHub does, may show its copy for a while). Markdown:

[![CVE-2026-129118](https://cve.bz/cve/badge/CVE-2026-129118.svg)](https://cve.bz/cve/CVE-2026-129118)

HTML:

<a href="https://cve.bz/cve/CVE-2026-129118"><img src="https://cve.bz/cve/badge/CVE-2026-129118.svg" alt="CVE-2026-129118"></a>

Affected

Versions

From the CNA's record in the CVE List.

ProductAffected
OpenKermit C-Kermitfrom 8.0.200 before 11.1.515

History

  1. The NVD deferred its analysis

Changes since this site first stored the record. The same for every record: /api/public/changes.

References

Check your stackJSON