CVE-2026-56774

MEDIUMPre-NVD 5.45.4
EchelonGraph scoreMEDIUM confidence

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

Score 5.4 from GitHub Security Advisory published 2026-06-25. A secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated
5.4EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 5.4Exploit: No code on recordExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

Kanboard through 1.2.52, fixed in commit 928c68a, UserViewController::removeSession fails to validate the session id parameter before passing it to RememberMeSessionModel::remove, allowing authenticated users to delete other users' Remember Me sessions. Attackers can enumerate sequential session IDs and mass-invalidate persistent login sessions of any user, including administrators, forcing re-authentication and causing denial of service.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100

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)
Severity54% × 45%
The EG Score, 5.4 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (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: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

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

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (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

June 25, 2026

Last Modified

July 14, 2026

Advisory Details (4)

Auto-updated Jun 25, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit, github_pr.
Web page

Kanboard - Cross-User Deletion of Persistent Login Sessions via Unvalidated Session ID | Advisories | VulnCheck

https://www.vulncheck.com/advisories/kanboard-cross-user-deletion-of-persistent-login-sessions-via-unvalidated-session-id
GitHub pull request

fix(user): scope remember me session removal to its owner

Fix merged in kanboard/kanboard PR #5831 on 2026-06-05 — awaiting tagged release

https://github.com/kanboard/kanboard/pull/5831
Web page

[Security]: Cross-user deletion of persistent login sessions via removeSession IDOR · Issue #5829 · kanboard/kanboard · GitHub

https://github.com/kanboard/kanboard/issues/5829
GitHub commit

commit 928c68aa2b7c (kanboard/kanboard)

Fix landed in kanboard/kanboard commit 928c68aa2b7c — awaiting tagged release

https://github.com/kanboard/kanboard/commit/928c68aa2b7c00092dd71084d329b912e229f3d1

Vendor Advisories for CVE-2026-56774(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 36× 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.

Showing the most recent 100 of 205 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 105 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 19:38 UTCEG score recompute
  2. 2026-10-11 16:53 UTCEG score recompute
  3. 2026-10-11 14:15 UTCEG score recompute
  4. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  7. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  9. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  12. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  13. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  14. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  15. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  16. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  17. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  18. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  19. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  20. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  21. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  22. 2026-09-23 08:30 UTCEG score recompute
  23. 2026-09-23 08:30 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  24. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  25. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 40th percentile
Show 75 more
  1. 2026-09-18 07:20 UTCEG score recompute
  2. 2026-09-18 07:20 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  3. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  4. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  5. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  6. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  7. 2026-09-14 01:17 UTCEG score recompute
  8. 2026-09-14 01:17 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  9. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  10. 2026-09-12 15:43 UTCEG score recompute
  11. 2026-09-12 15:43 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  12. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  13. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  14. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  15. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  16. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  17. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  18. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  19. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  20. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  21. 2026-08-30 19:31 UTCEG score recompute
  22. 2026-08-30 19:31 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  23. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  24. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  25. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  26. 2026-08-27 23:17 UTCEG score recompute
  27. 2026-08-27 23:17 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  28. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  29. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  30. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  31. 2026-08-24 13:09 UTCEG score recompute
  32. 2026-08-24 13:09 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  33. 2026-08-23 09:37 UTCEG score recompute
  34. 2026-08-23 09:37 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  35. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  36. 2026-08-22 10:01 UTCEG score recompute
  37. 2026-08-22 10:01 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  38. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  39. 2026-08-21 06:34 UTCEG score recompute
  40. 2026-08-21 06:34 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  41. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  42. 2026-08-20 07:02 UTCEG score recompute
  43. 2026-08-20 07:02 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  44. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  45. 2026-08-19 01:14 UTCEG score recompute
  46. 2026-08-19 01:14 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  47. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  48. 2026-08-17 16:56 UTCEG score recompute
  49. 2026-08-17 16:56 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  50. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  51. 2026-08-16 17:05 UTCEG score recompute
  52. 2026-08-16 17:05 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  53. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  54. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  55. 2026-08-15 17:33 UTCEG score recompute
  56. 2026-08-15 17:33 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  57. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  58. 2026-08-14 18:00 UTCEG score recompute
  59. 2026-08-14 18:00 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  60. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  61. 2026-08-13 18:28 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  62. 2026-08-12 18:28 UTCEG score recompute
  63. 2026-08-12 18:28 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  64. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  65. 2026-08-11 18:56 UTCEG score recompute
  66. 2026-08-11 18:56 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  67. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  68. 2026-08-10 19:24 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  69. 2026-08-09 19:52 UTCEG score recompute
  70. 2026-08-09 19:52 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  71. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  72. 2026-08-08 20:21 UTCEG score recompute
  73. 2026-08-08 20:21 UTCGHSA enrichmentGHSA-vvjm-mjq4-27c8 · GitHub CVSS 5.4
  74. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  75. 2026-08-07 20:49 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-56774?
CVE-2026-56774 is a medium-severity vulnerability; its CVE record was published on June 25, 2026. Kanboard through 1.2.52, fixed in commit 928c68a, UserViewController::removeSession fails to validate the session id parameter before passing it to RememberMeSessionModel::remove, allowing authenticated users to delete other users' Remember Me sessions. Attackers can enumerate sequential session…
When was CVE-2026-56774 made public?
CVE-2026-56774 was made public on June 4, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on June 25, 2026. EchelonGraph's copy of the record carries a last-modified date of July 14, 2026; the record at its source may have been updated since.
Is CVE-2026-56774 actively exploited?
CVE-2026-56774 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-56774?
CVE-2026-56774 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-56774?
An upstream fix for CVE-2026-56774 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-56774 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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