DEBIAN-CVE-2026-19349

See a problem?
Please try reporting it to the source first.
Source
https://security-tracker.debian.org/tracker/CVE-2026-19349
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19349.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-19349
Upstream
Published
2026-08-16T14:16:54Z
Modified
2026-09-14T17:02:50Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

Lemonldap::NG::Portal versions from 2.0.0 before 2.16.9, from 2.17.0 before 2.21.5, from 2.22.0 before 2.23.3 for Perl allow authentication bypass via an OAuth2 state parameter stored as an SSO session in the GitHub and LinkedIn backends. Before redirecting to the identity provider, extractFormInfo() creates the state session with the positional call getApacheSession( undef, 1, 0, 'GitHubState' ). getApacheSession() takes a session id followed by a named argument hash, so the trailing arguments become that hash, kind defaults to SSO, and the state is written to the global session storage as a regular SSO session. Its identifier is handed to the unauthenticated visitor as the state parameter of the redirection URL. Any visitor who reaches the GitHub or LinkedIn endpoint can replay that identifier as a session cookie and obtain a valid SSO session without authenticating. The session holds neither _user nor authenticationLevel, which the shipped bootstrap configuration accepts because it grants virtual hosts a "default => accept" access rule; deployments whose rules test the user or require an authentication level are less exposed. Only configurations with the GitHub or LinkedIn authentication module enabled are affected.

References

Affected packages

Debian:12 / lemonldap-ng

Package

Name
lemonldap-ng
Purl
pkg:deb/debian/lemonldap-ng?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.16.1+ds-deb12u9

Affected versions

2.*
2.16.1+ds-2
2.16.1+ds-deb12u1
2.16.1+ds-deb12u2
2.16.1+ds-deb12u3
2.16.1+ds-deb12u4
2.16.1+ds-deb12u5
2.16.1+ds-deb12u6
2.16.1+ds-deb12u7
2.16.1+ds-deb12u8

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19349.json"

Debian:13 / lemonldap-ng

Package

Name
lemonldap-ng
Purl
pkg:deb/debian/lemonldap-ng?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.21.2+ds-1+deb13u3

Affected versions

2.*
2.21.2+ds-1
2.21.2+ds-1+deb13u1
2.21.2+ds-1+deb13u2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19349.json"