What is CVE-2026-5078?

CVE-2026-5078 is a medium-severity vulnerability in Morgan, classified under Improper Output Neutralization for Logs. CVSS score: 5.3/10. Published 2026-06-03.

How severe is CVE-2026-5078?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Morgan

CVE-2026-5078

Impact: The morgan logging middleware's :remote-user token extracts the Basic auth username from the Authorization request header and writes it to the log stream without neutralizing control characters. An unauthenticated attacker can send…

EPSS: 0.000 (9.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Morgan — versions 1.2.0, 1.11.0
Morgan_project Morgan

Weakness classification (CWE)

CWE-117 — Improper Output Neutralization for Logs

References

ce714d77-add3-4f53-aff5-83d477b104bb (Mitigation, Vendor Advisory)
ce714d77-add3-4f53-aff5-83d477b104bb (Third Party Advisory)

Frequently asked questions

What is CVE-2026-5078?: CVE-2026-5078 is a medium-severity vulnerability in Morgan, classified under Improper Output Neutralization for Logs. CVSS score: 5.3/10. Published 2026-06-03.
How severe is CVE-2026-5078?: Medium severity. CVSS v3 base score is 5.3 out of 10.