CVE-2026-12804

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory (severity: LOW) published 2026-06-21. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A vulnerability was detected in lemonldap-ng up to 2.23.0. Impacted is an unknown function in the library lemonldap-ng-portal/lib/Lemonldap/NG/Portal/CDC.pm of the component SAML Common Domain Cookie Endpoint. Performing a manipulation of the argument url results in open redirect. The attack is possible to be carried out remotely. The exploit is now public and may be used. Applying a patch is the recommended action to fix this issue. The vendor confirms, that "it has been fixed some days ago and will be available in 2.23.1. CDC is quite never used, so the impact is very low."

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity43% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

June 21, 2026

Last Modified

June 22, 2026

References (6)

Vendor Advisories for CVE-2026-12804(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
lemonldap-ng2.0.11+ds-4 ... 2.23.2+ds-2 (114 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
lemonldap-ng2.16.1+ds-2 ... 2.16.1+ds-deb12u8 (9 versions)2.16.1+ds-deb12u9—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
lemonldap-ng2.21.2+ds-1, 2.21.2+ds-1+deb13u1, 2.21.2+ds-1+deb13u22.21.2+ds-1+deb13u3—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
lemonldap-ng2.21.2+ds-1 ... 2.23.0+ds-4 (19 versions)2.23.1+ds-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 156 total refreshes for this CVE.

  1. 2026-09-11 14:52 UTCEPSS rescore
  2. 2026-09-11 09:36 UTCEPSS rescore
  3. 2026-09-10 09:34 UTCEPSS rescore
  4. 2026-09-08 22:00 UTCEPSS rescore
  5. 2026-09-07 16:01 UTCEPSS rescore
  6. 2026-09-06 13:47 UTCEPSS rescore
  7. 2026-09-04 05:06 UTCEPSS rescore
  8. 2026-09-02 14:11 UTCEPSS rescore
  9. 2026-09-01 13:53 UTCEPSS rescore
  10. 2026-09-01 04:39 UTCEPSS rescore
  11. 2026-08-30 20:41 UTCEG score recompute
  12. 2026-08-30 20:41 UTCGHSA enrichment
  13. 2026-08-30 19:17 UTCEPSS rescore
  14. 2026-08-30 01:21 UTCEPSS rescore
  15. 2026-08-28 21:40 UTCEPSS rescore
  16. 2026-08-25 13:48 UTCEPSS rescore
  17. 2026-08-25 03:19 UTCEG score recompute
  18. 2026-08-25 03:19 UTCGHSA enrichment
  19. 2026-08-24 01:08 UTCEG score recompute
  20. 2026-08-24 01:08 UTCGHSA enrichment
  21. 2026-08-23 00:19 UTCEPSS rescore
  22. 2026-08-22 22:54 UTCEG score recompute
  23. 2026-08-22 22:54 UTCGHSA enrichment
  24. 2026-08-21 23:48 UTCEPSS rescore
  25. 2026-08-21 10:10 UTCEG score recompute
Show 75 more
  1. 2026-08-21 10:10 UTCGHSA enrichment
  2. 2026-08-20 22:55 UTCEPSS rescore
  3. 2026-08-20 07:59 UTCEG score recompute
  4. 2026-08-20 07:59 UTCGHSA enrichment
  5. 2026-08-19 17:03 UTCEPSS rescore
  6. 2026-08-19 05:47 UTCEG score recompute
  7. 2026-08-19 05:47 UTCGHSA enrichment
  8. 2026-08-18 13:48 UTCEPSS rescore
  9. 2026-08-16 16:45 UTCEG score recompute
  10. 2026-08-16 16:45 UTCGHSA enrichment
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 02:14 UTCEPSS rescore
  13. 2026-08-15 14:34 UTCEG score recompute
  14. 2026-08-15 14:34 UTCGHSA enrichment
  15. 2026-08-15 01:30 UTCEPSS rescore
  16. 2026-08-14 12:21 UTCEG score recompute
  17. 2026-08-14 12:21 UTCGHSA enrichment
  18. 2026-08-13 22:00 UTCEPSS rescore
  19. 2026-08-13 10:10 UTCEG score recompute
  20. 2026-08-13 10:10 UTCGHSA enrichment
  21. 2026-08-12 13:50 UTCEPSS rescore
  22. 2026-08-12 07:59 UTCEG score recompute
  23. 2026-08-12 07:58 UTCGHSA enrichment
  24. 2026-08-11 13:42 UTCEPSS rescore
  25. 2026-08-11 05:46 UTCEG score recompute
  26. 2026-08-11 05:46 UTCGHSA enrichment
  27. 2026-08-10 23:59 UTCEPSS rescore
  28. 2026-08-10 03:35 UTCEG score recompute
  29. 2026-08-10 03:35 UTCGHSA enrichment
  30. 2026-08-09 13:46 UTCEPSS rescore
  31. 2026-08-09 01:23 UTCEG score recompute
  32. 2026-08-09 01:23 UTCGHSA enrichment
  33. 2026-08-08 16:37 UTCEPSS rescore
  34. 2026-08-07 23:11 UTCEG score recompute
  35. 2026-08-07 23:11 UTCGHSA enrichment
  36. 2026-08-06 21:00 UTCEG score recompute
  37. 2026-08-06 21:00 UTCGHSA enrichment
  38. 2026-08-06 13:46 UTCEPSS rescore
  39. 2026-08-05 19:17 UTCEPSS rescore
  40. 2026-08-05 18:48 UTCGHSA enrichment
  41. 2026-08-04 16:37 UTCEG score recompute
  42. 2026-08-04 16:37 UTCGHSA enrichment
  43. 2026-08-04 15:09 UTCEPSS rescore
  44. 2026-08-04 10:38 UTCEPSS rescore
  45. 2026-08-03 14:19 UTCEG score recompute
  46. 2026-08-03 14:19 UTCGHSA enrichment
  47. 2026-08-03 10:35 UTCEPSS rescore
  48. 2026-08-02 10:12 UTCEG score recompute
  49. 2026-08-02 10:12 UTCGHSA enrichment
  50. 2026-08-02 02:26 UTCEPSS rescore
  51. 2026-08-01 08:01 UTCEG score recompute
  52. 2026-08-01 08:01 UTCGHSA enrichment
  53. 2026-08-01 04:15 UTCEPSS rescore
  54. 2026-07-31 05:50 UTCEG score recompute
  55. 2026-07-31 05:50 UTCGHSA enrichment
  56. 2026-07-30 16:27 UTCEPSS rescore
  57. 2026-07-30 03:38 UTCEG score recompute
  58. 2026-07-30 03:38 UTCGHSA enrichment
  59. 2026-07-30 01:30 UTCEPSS rescore
  60. 2026-07-29 01:25 UTCEG score recompute
  61. 2026-07-29 01:25 UTCGHSA enrichment
  62. 2026-07-28 15:36 UTCEPSS rescore
  63. 2026-07-27 18:30 UTCEG score recompute
  64. 2026-07-27 18:30 UTCGHSA enrichment
  65. 2026-07-27 14:13 UTCEPSS rescore
  66. 2026-07-26 16:18 UTCEG score recompute
  67. 2026-07-26 16:18 UTCGHSA enrichment
  68. 2026-07-26 14:54 UTCEPSS rescore
  69. 2026-07-26 14:54 UTCEPSS rescore
  70. 2026-07-25 14:17 UTCEPSS rescore
  71. 2026-07-24 14:17 UTCEPSS rescore
  72. 2026-07-23 14:18 UTCEPSS rescore
  73. 2026-07-23 03:05 UTCEG score recompute
  74. 2026-07-22 14:08 UTCEPSS rescore
  75. 2026-07-21 15:24 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-12804?
CVE-2026-12804 is a medium vulnerability published on June 21, 2026. A vulnerability was detected in lemonldap-ng up to 2.23.0. Impacted is an unknown function in the library lemonldap-ng-portal/lib/Lemonldap/NG/Portal/CDC.pm of the component SAML Common Domain Cookie Endpoint. Performing a manipulation of the argument url results in open redirect. The attack is…
When was CVE-2026-12804 disclosed?
CVE-2026-12804 was first published in the National Vulnerability Database on June 21, 2026, with the most recent update on June 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12804 actively exploited?
CVE-2026-12804 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 82.3% of all scored CVEs.
What is the CVSS score of CVE-2026-12804?
CVE-2026-12804 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-12804?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12804, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-12804

Explore →

Is Your Infrastructure Affected by CVE-2026-12804?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs