CVE-2026-55106

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (36th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
5.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.3Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

authentik is an open-source identity provider. Prior to 2026.2.6 and 2026.5.5, a diagnostic action on the LDAP Source API does not enforce the object-level read-authorization filter used by the rest of the API. Any party able to reach the API, including an unauthenticated client, can invoke the diagnostic action against a configured LDAP Source. The server then connects to the upstream directory using the source's configured bind credentials and returns a bounded set of directory entries. The response exposes the distinguished names of those entries and the names of the attributes present on them, revealing directory structure, naming conventions, and the existence of specific accounts and groups, but not attribute values. Deployments without a configured LDAP Source are not affected. This issue is fixed in versions 2026.2.6 and 2026.5.5.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100

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 (value × EchelonGraph’s weight)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
36th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 18, 2026

Last Modified

September 8, 2026

Advisory Details (5)

Auto-updated Aug 18, 2026
Fix named in the CVE record. Sources: github_commit, github_pr, github.
GitHub advisoryMentions a patch (unverified)

LDAP Source debug endpoint accessible without authorization · Advisory · goauthentik/authentik · GitHub

https://github.com/goauthentik/authentik/security/advisories/GHSA-h8ff-c3h7-2gf8
GitHub pull request

security: automated internal backport of patch 1887.sec.patch to authentik-2026.5

Fix merged in goauthentik/authentik PR #24060 on 2026-07-15 — awaiting tagged release

https://github.com/goauthentik/authentik/pull/24060
GitHub pull request

security: automated internal backport of patch 1887.sec.patch to authentik-2026.2

Fix merged in goauthentik/authentik PR #24055 on 2026-07-15 — awaiting tagged release

https://github.com/goauthentik/authentik/pull/24055
GitHub commit

commit fc336da4bd32 (goauthentik/authentik)

Fix landed in goauthentik/authentik commit fc336da4bd32 — awaiting tagged release

https://github.com/goauthentik/authentik/commit/fc336da4bd32bef52800c77d91aa0b82c5533041
GitHub commit

commit e638de232174 (goauthentik/authentik)

Fix landed in goauthentik/authentik commit e638de232174 — awaiting tagged release

https://github.com/goauthentik/authentik/commit/e638de23217480854ec5e48ca6fceae479321f99

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 51× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  4. 2026-10-12 15:56 UTCEG score recompute
  5. 2026-10-11 19:39 UTCEG score recompute
  6. 2026-10-11 16:54 UTCEG score recompute
  7. 2026-10-11 14:17 UTCEG score recompute
  8. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  11. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  13. 2026-10-07 11:12 UTCEG score recompute
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  15. 2026-10-06 12:53 UTCEG score recompute
  16. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  17. 2026-10-05 14:33 UTCEG score recompute
  18. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  19. 2026-10-03 17:38 UTCEG score recompute
  20. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  21. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  22. 2026-10-02 06:53 UTCEG score recompute
  23. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  24. 2026-10-01 08:00 UTCEG score recompute
  25. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 35th percentile
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  1. 2026-09-30 09:48 UTCEG score recompute
  2. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  3. 2026-09-29 04:19 UTCEG score recompute
  4. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  5. 2026-09-28 06:07 UTCEG score recompute
  6. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  7. 2026-09-27 07:55 UTCEG score recompute
  8. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  9. 2026-09-25 01:27 UTCEG score recompute
  10. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  11. 2026-09-23 20:19 UTCEG score recompute
  12. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  13. 2026-09-22 20:25 UTCEG score recompute
  14. 2026-09-20 22:21 UTCEG score recompute
  15. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  16. 2026-09-20 00:08 UTCEG score recompute
  17. 2026-09-19 01:56 UTCEG score recompute
  18. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  19. 2026-09-18 03:43 UTCEG score recompute
  20. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  21. 2026-09-17 05:31 UTCEG score recompute
  22. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  23. 2026-09-16 07:18 UTCEG score recompute
  24. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  25. 2026-09-15 09:04 UTCEG score recompute
  26. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  27. 2026-09-14 10:52 UTCEG score recompute
  28. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  29. 2026-09-13 12:40 UTCEG score recompute
  30. 2026-09-11 16:15 UTCEG score recompute
  31. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  32. 2026-09-10 17:46 UTCEG score recompute
  33. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  34. 2026-09-09 19:33 UTCEG score recompute
  35. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  36. 2026-09-07 16:08 UTCEG score recompute
  37. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  38. 2026-09-06 15:27 UTCEG score recompute
  39. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  40. 2026-09-05 17:14 UTCEG score recompute
  41. 2026-09-04 19:01 UTCEG score recompute
  42. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  43. 2026-09-02 21:56 UTCEG score recompute
  44. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  45. 2026-09-01 20:38 UTCEG score recompute
  46. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  47. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  48. 2026-08-31 00:14 UTCEG score recompute
  49. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  50. 2026-08-30 02:02 UTCEG score recompute
  51. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  52. 2026-08-29 03:49 UTCEG score recompute
  53. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  54. 2026-08-28 02:24 UTCEG score recompute
  55. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  56. 2026-08-27 04:12 UTCEG score recompute
  57. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  58. 2026-08-26 06:00 UTCEG score recompute
  59. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  60. 2026-08-25 07:48 UTCEG score recompute
  61. 2026-08-24 09:36 UTCEG score recompute
  62. 2026-08-23 11:24 UTCEG score recompute
  63. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  64. 2026-08-22 13:12 UTCEG score recompute
  65. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  66. 2026-08-21 15:00 UTCEG score recompute
  67. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  68. 2026-08-19 18:36 UTCEG score recompute
  69. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  70. 2026-08-18 20:23 UTCEG score recompute
  71. 2026-08-18 19:19 UTCEG score recompute
  72. 2026-08-18 17:21 UTCEG score recompute
  73. 2026-08-18 17:07 UTCEG score recomputeFirst assessed: 5.3 MEDIUM
  74. 2026-08-18 17:04 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-55106?
CVE-2026-55106 is a medium-severity vulnerability; its CVE record was published on August 18, 2026. authentik is an open-source identity provider. Prior to 2026.2.6 and 2026.5.5, a diagnostic action on the LDAP Source API does not enforce the object-level read-authorization filter used by the rest of the API. Any party able to reach the API, including an unauthenticated client, can invoke the…
When was the CVE record for CVE-2026-55106 published?
The CVE record for CVE-2026-55106 was published on August 18, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 8, 2026; the record at its source may have been updated since.
Is CVE-2026-55106 actively exploited?
CVE-2026-55106 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55106?
CVE-2026-55106 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55106?
The CVE record for CVE-2026-55106 names the fix: "This issue is fixed in versions 2026.2.6 and 2026.5.5."

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