DEBIAN-CVE-2026-92289

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Source
https://security-tracker.debian.org/tracker/CVE-2026-92289
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-92289.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-92289
Upstream
  • CVE-2026-92289
Published
2026-09-24T20:47:22Z
Modified
2026-09-25T05:00:09Z
Summary
[none]
Details

Lemonldap::NG::Portal versions from 2.23.0 before 2.23.4 for Perl allow a PKCE bypass for public Relying Parties in "PKCE or secret" mode because checkEndPointAuthenticationCredentials does not verify the client secret. With oidcRPMetaDataOptionsRequirePKCE set to 2, the authorization endpoint issues a code even when the request carries no code_challenge, and token() admits the exchange as long as a challenge was stored or an authentication method was returned for the caller. checkEndPointAuthenticationCredentials() skips the secret comparison for a Relying Party marked public and still returns the method deduced from the request, so any Basic or form credential satisfies the secret branch. validatePKCEChallenge() then passes, because neither a challenge nor a verifier is present. An attacker who intercepts an authorization code issued to a public Relying Party can exchange it for the user's access, ID and refresh tokens by replaying the client_id with an arbitrary secret, which is the attack PKCE prevents. Dynamic client registration creates every Relying Party in this mode.

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

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
2.16.1+ds-deb12u9
2.16.2+ds-1
2.17.0+ds-1~bpo12+1
2.17.0+ds-1
2.17.0+ds2-1~bpo11+1
2.17.0+ds2-1
2.17.1+ds-1
2.17.2+ds-1
2.17.2+ds-2~bpo11+1
2.17.2+ds-2~bpo12+1
2.17.2+ds-2
2.18.1+ds-1~bpo10+1
2.18.1+ds-1~bpo11+1
2.18.1+ds-1~bpo12+1
2.18.1+ds-1
2.18.2+ds-1~bpo10+1
2.18.2+ds-1~bpo11+1
2.18.2+ds-1~bpo12+1
2.18.2+ds-1
2.19.0+ds-1
2.19.0+ds-2~bpo11+1
2.19.0+ds-2~bpo12+1
2.19.0+ds-2
2.19.1+ds-1
2.19.1+ds-2
2.19.1+ds-3~bpo12+1
2.19.1+ds-3
2.19.1+ds-4
2.19.2+ds-1~bpo11+1
2.19.2+ds-1~bpo12+1
2.19.2+ds-1
2.20.0+ds-1
2.20.0+ds-2~bpo12+1
2.20.0+ds-2
2.20.1+ds-1~bpo12+1
2.20.1+ds-1
2.20.2+ds-1~bpo12+1
2.20.2+ds-1
2.21.0+ds-1
2.21.0+ds-2~bpo12+1
2.21.0+ds-2
2.21.0+ds-3
2.21.0+ds-4
2.21.1+ds-1~bpo12+1
2.21.1+ds-1
2.21.2+ds-1~bpo12+1
2.21.2+ds-1
2.21.2+ds-2
2.21.3+ds-1~bpo12+1
2.21.3+ds-1~bpo13+1
2.21.3+ds-1
2.22.0+ds-1
2.22.0+ds-2~bpo13+1
2.22.0+ds-2
2.22.1+ds-1~bpo13+1
2.22.1+ds-1
2.22.2+ds-1~bpo13+1
2.22.2+ds-1
2.22.3+ds-1~bpo13+1
2.22.3+ds-1
2.23.0+ds-1
2.23.0+ds-2
2.23.0+ds-3~bpo13+1
2.23.0+ds-3
2.23.0+ds-4
2.23.1+ds-1
2.23.2+ds-1~bpo13+1
2.23.2+ds-1
2.23.2+ds-2
2.23.3+ds-1
2.23.4+ds-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-92289.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

Affected versions

2.*
2.21.2+ds-1
2.21.2+ds-1+deb13u1
2.21.2+ds-1+deb13u2
2.21.2+ds-1+deb13u3
2.21.2+ds-2
2.21.3+ds-1~bpo12+1
2.21.3+ds-1~bpo13+1
2.21.3+ds-1
2.22.0+ds-1
2.22.0+ds-2~bpo13+1
2.22.0+ds-2
2.22.1+ds-1~bpo13+1
2.22.1+ds-1
2.22.2+ds-1~bpo13+1
2.22.2+ds-1
2.22.3+ds-1~bpo13+1
2.22.3+ds-1
2.23.0+ds-1
2.23.0+ds-2
2.23.0+ds-3~bpo13+1
2.23.0+ds-3
2.23.0+ds-4
2.23.1+ds-1
2.23.2+ds-1~bpo13+1
2.23.2+ds-1
2.23.2+ds-2
2.23.3+ds-1
2.23.4+ds-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-92289.json"