CVE-2026-5078

Aliases:GHSA-4vj7-5mj6-jm8mDEBIAN-CVE-2026-5078CGA-5crg-pp8q-3jxcCGA-9hph-7663-p6hmCGA-9r8v-wqvv-p9mwCGA-mv6q-2x9w-jp4hCGA-2gf8-3vmc-6g5qCGA-2xq7-664v-h39cCGA-4w35-j7q3-7chpCGA-5794-5g5x-28q9CGA-6cgm-qrq7-74rmCGA-848p-j8fg-p795CGA-h2fc-mmx7-7mc5CGA-j7qh-x86r-g34cCGA-p33v-q6cm-m98rCGA-w4vg-4c8x-24p3
Advisory lineage Upstream: 0 Downstream: 2
Analyzed
Published: 03 Jun 2026, 05:56
Last modified:03 Jun 2026, 13:19

Vulnerability Summary

Overall Risk (default)
low
21/100
CVSS Score
5.3 MEDIUM
v3.1 (cve.org)
EPSS Score
0.33% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

03 Jun 2026, 05:56
Published
Vulnerability first disclosed
03 Jun 2026, 13:19
Last Modified
Vulnerability information updated

Description

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 a crafted Authorization Basic header containing CR or LF bytes to inject forged log lines, breaking the one-request-per-line structure of access logs and enabling log forgery against downstream log consumers. The built-in combined, common, default, and short formats are affected, as well as any custom format that references :remote-user. Affected versions: morgan 1.2.0 through 1.10.1. Patches: upgrade to morgan 1.11.0, which neutralizes control characters in the :remote-user token output. Workarounds: use a custom format string that does not include :remote-user.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Trends

Current EPSS score: 0.33%• Percentile: 27%

Techniques & Countermeasures

  • CWE-117•Improper Output Neutralization for Logs

    The product constructs a log message from external input, but it does not neutralize or incorrectly neutralizes special elements when the message is written to a log file.

Affected Systems

  • chainguard•azurite

    < 3.35.0-r3

  • chainguard•tileserver-gl

    < 5.6.0-r10

  • chainguard•tileserver-gl-fips

    < 5.6.0-r9

  • chainguard•wazuh-dashboard-security-plugin

    < 4.14.7-r14

  • chainguard•wazuh-dashboard-security-plugin-fips

    < 4.14.7-r14

  • wolfi•tileserver-gl

    < 5.6.0-r10

  • debian•node-morgan

    all | all | all | all | < 1.12.0+~1.9.10-1

  • morgan_project•morgan

    ≥ 1.2.0, < 1.11.0

  • morgan•morgan

    ≥ 1.2.0, ≤ 1.10.1

  • Npm•morgan

    ≥ 1.2.0, < 1.11.0

References (6)