CVE catalog

CVE-2019-3878

libapache2-mod-auth-mellon: CVE-2019-3878

[CVE catalog]

Severity
High · CVSS 8.1CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
Source
[NVD] · [CVE record]
EPSS
2.97% · Oct 25, 2026

A vulnerability was found in mod_auth_mellon before v0.14.2. If Apache is configured as a reverse proxy and mod_auth_mellon is configured to only let through authenticated users (with the require valid-user directive), adding special HTTP headers that are normally used to start the special SAML ECP (non-browser based) can be used to bypass authentication.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

DistributionPackageReleaseVersionStatus
Debianlibapache2-mod-auth-mellonsid0.19.1-1.1fixed
Debianlibapache2-mod-auth-mellonforky0.19.1-1.1fixed
Debianlibapache2-mod-auth-mellontrixie0.19.1-1fixed
Debianlibapache2-mod-auth-mellonbookworm0.18.1-1fixed
Ubuntulibapache2-mod-auth-mellon16.040.10.0-1vulnerable
Ubuntulibapache2-mod-auth-mellon16.040.11.0-1vulnerable
Ubuntulibapache2-mod-auth-mellon16.040.12.0-1vulnerable
Ubuntulibapache2-mod-auth-mellon16.040.12.0-2+deb9u1build0.16.04.1fixed
Ubuntulibapache2-mod-auth-mellon18.040.13.1-1vulnerable
Ubuntulibapache2-mod-auth-mellon18.040.13.1-1build1vulnerable
Ubuntulibapache2-mod-auth-mellon18.040.13.1-1build2vulnerable
Ubuntulibapache2-mod-auth-mellon18.040.13.1-1ubuntu0.1fixed
Ubuntulibapache2-mod-auth-mellon20.040.14.2-1ubuntu1fixed

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
Debianlibapache2-mod-auth-mellonsourcesid0.14.2-1not yet assignedNot reported[925197]
Debianlibapache2-mod-auth-mellonsourceforky0.14.2-1not yet assignedNot reported[925197]
Debianlibapache2-mod-auth-mellonsourcetrixie0.14.2-1not yet assignedNot reported[925197]
Debianlibapache2-mod-auth-mellonsourcebookworm0.14.2-1not yet assignedNot reported[925197]
Ubuntulibapache2-mod-auth-mellondeb16.040.12.0-2+deb9u1build0.16.04.1Not reportedUBUNTU-CVE-2019-3878Not reported
Ubuntulibapache2-mod-auth-mellondeb18.040.13.1-1ubuntu0.1Not reportedUBUNTU-CVE-2019-3878Not reported
Ubuntulibapache2-mod-auth-mellondeb20.040.14.2-1ubuntu1Not reportedUBUNTU-CVE-2019-3878Not reported

[Debian bug #925197]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

  • [libapache2-mod-auth-mellon]Fixed
    Details (2)

    • 0.18.1-1 · amd64 · bookworm

      Fixed · Fixed: 0.14.2-1

      dsa · libapache2-mod-auth-mellon · debian · bookworm; dsa · libapache2-mod-auth-mellon · debian · 12

    • 0.18.1-1 · arm64 · bookworm

      Fixed · Fixed: 0.14.2-1

      dsa · libapache2-mod-auth-mellon · debian · bookworm; dsa · libapache2-mod-auth-mellon · debian · 12

[Debian 13 (Trixie)]

  • [libapache2-mod-auth-mellon]Fixed

    Source package: [libapache2-mod-auth-mellon]

    Details (2)

    • 0.19.1-1 · amd64 · trixie

      Fixed · Fixed: 0.14.2-1

      dsa · libapache2-mod-auth-mellon · debian · 13

    • 0.19.1-1+b1 · arm64 · trixie

      Fixed · Fixed: 0.14.2-1

      dsa · libapache2-mod-auth-mellon · debian · 13

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]