CVE-2026-6993

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.32% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 24.1% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Deferred. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-04-25 18:30Z4 MO AGO

Last updated

2026-04-27 13:41Z4 MO AGO

Reserved

2026-04-24

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 6.9)

CNA CVSS vector

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

Weaknesses

• CWE-441Unintended Proxy or Intermediary ('Confused Deputy')Class
• CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')Base

Data version

5.2

Document digest

f03a79d44c13176dad91ba6fa80bb85ebe12cf7398c7d5e11e5437f1b94af1f0

• vuldb.comVDB-359545 | go-kratos http.DefaultServeMux Fallback server.go NewServer confused deputyhttps://vuldb.com/vuln/359545vdb-entrytechnical-description
• vuldb.comVDB-359545 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/vuln/359545/ctisignaturepermissions-required
• vuldb.comSubmit #797099 | go-kratos kratos 2.9.2 Unintended Route Exposure via DefaultServeMux Fallbackhttps://vuldb.com/submit/797099third-party-advisory
• github.comhttps://github.com/go-kratos/kratos/issues/3810exploitissue-tracking
• github.comhttps://github.com/go-kratos/kratos/pull/3814issue-trackingpatch
• github.comhttps://github.com/Yanhu007/kratos/commit/0284a5bcf92b5a7ee015300ce3051baf7ae4718dpatch
• github.comhttps://github.com/go-kratos/kratos/product