CVE catalog
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 character
- Severity
- Medium · CVSS 5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.33% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | node-morgan | sid | 1.12.1+~1.9.10-1 | fixed |
| Debian | node-morgan | forky | 1.12.1+~1.9.10-1 | fixed |
| Debian | node-morgan | trixie | 1.10.0+~1.9.3-1 | vulnerable |
| Debian | node-morgan | bookworm | 1.10.0+~1.9.3-1 | vulnerable |
| Cpe | morgan | Not reported | 1.11.0 | fixed |
| Npm | morgan | Not reported | 1.11.0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | node-morgan | source | sid | 1.12.0+~1.9.10-1 | not yet assigned | Not reported | Not reported |
| Debian | node-morgan | source | forky | 1.12.0+~1.9.10-1 | not yet assigned | Not reported | Not reported |
| Debian | node-morgan | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | node-morgan | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Cpe | morgan | cpe | Not reported | 1.11.0 | Not reported | Not reported | Not reported |
| Npm | morgan | npm | Not reported | 1.11.0 | Not reported | Not reported | Not reported |
Notes
[trixie] node-morgan: Minor issue [bookworm] node-morgan: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [node-morgan]Affected
Details (2)
1.10.0+~1.9.3-1· all · bookwormAffected
nvd · node-morgan · debian · bookworm; nvd · node-morgan · debian · 12
1.10.0+~1.9.3-1· all · bookwormAffected
nvd · node-morgan · debian · bookworm; nvd · node-morgan · debian · 12
[Debian 13 (Trixie)]
- [node-morgan]Affected
Details (2)
1.10.0+~1.9.3-1· all · trixieAffected
nvd · node-morgan · debian · 13
1.10.0+~1.9.3-1· all · trixieAffected
nvd · node-morgan · debian · 13
Observed:
References
- [https://github.com/advisories/GHSA-4vj7-5mj6-jm8m]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-5078]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-5078]
- [https://security-tracker.debian.org/tracker/CVE-2026-5078]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5078.json]
[Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]