01 Record

CVE-2026-19349

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

CriticalPUBLISHEDCNA: CPANSec

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.81% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 56.8% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Deferred. NVD last modified this record on 2026-08-26.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-08-16 13:22Z2 MO AGO

Last updated

2026-08-17 16:38Z2 MO AGO

Reserved

2026-08-08

Assigning CNA

CPANSec

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-305Authentication Bypass by Primary WeaknessBase
CWE-628Function Call with Incorrectly Specified ArgumentsBase

Data version

5.2

Document digest

90c71285e0ab09adbcfd1bf95956b0156c5367d0d9d08b321d23d6fda9843343

05 Affected products

No products listed

This record names no affected vendor or product. That is common for reserved identifiers and for records whose CNA published only a narrative description.

06 References

gitlab.ow2.orghttps://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.23.3release-notes
gitlab.ow2.orghttps://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.21.5release-notes
gitlab.ow2.orghttps://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.16.9release-notes
www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/08/16/2

07 Remediation

Upgrade to Lemonldap-NG-Portal 2.16.9, 2.21.5 or 2.23.3 or later. Only 2.23.3 is on CPAN; the 2.16.9 and 2.21.5 LTS releases are available from https://lemonldap-ng.org/download.html.

08 Fixed in

Debian 12

lemonldap-ng
Fixed in 2.16.1+ds-deb12u9

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

lemonldap-ng
Fixed in 2.21.2+ds-1+deb13u3

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

lemonldap-ng
Fixed in 2.23.3+ds-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.