CVE catalog
CVE-2026-15603
morgan is an HTTP request logger middleware for Node.js. In versions prior to 1.12.0, the internal helper that escapes log token values did not neutralize the Unicode line separator characters U+0085
- 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
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.40% · Oct 25, 2026
morgan is an HTTP request logger middleware for Node.js. In versions prior to 1.12.0, the internal helper that escapes log token values did not neutralize the Unicode line separator characters U+0085 (Next Line), U+2028 (Line Separator), and U+2029 (Paragraph Separator). An unauthenticated remote client can place these characters in an attacker-controlled log token, for example a Basic auth username surfaced through the remote-user token, so that Unicode-aware downstream log processing splits a single request log into multiple logical records. This is a log forging issue (CWE-117) and an incomplete-fix follow-up to CVE-2026-5078, which only addressed ASCII control characters. The issue is fixed in morgan 1.12.0, which extends the escaping set to cover these Unicode line separators. Upgrade to morgan 1.12.0 to remediate.
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 | 1.12.0 | fixed |
| Npm | morgan | Not reported | 1.12.0 | 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 | 1.12.0 | Not reported | NVD-CVE-2026-15603 | Not reported |
| Npm | morgan | npm | Not reported | 1.12.0 | Not reported | GHSA-JXFW-X594-9X9M | 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://ftp.suse.com/pub/projects/security/]
- [https://github.com/advisories/GHSA-jxfw-x594-9x9m]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-15603]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-15603]
- [https://security-tracker.debian.org/tracker/CVE-2026-15603]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-15603.json]
[Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]