CVE-2026-52779

MEDIUMPre-NVD 5.45.4
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (22nd 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
Elevated
5.4EG
EchelonGraph verdictPlan a fixRemediate 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: 0.3%CVSS: 5.4Exploit: No code on recordExposed services: Not assessed

The CVE record names the fixed release — apply it.

OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, a cross-project IDOR / authorization context confusion in the Calendar and Team Planner modules allows a user with management permissions in one project to delete public Calendar or Team Planner Queries from another project where they do not have the corresponding management permissions. Both modules authorize the request against the project identified by :project_id in the URL, but the actual Query object is loaded later by :id from Query.visible(current_user) without verifying that the loaded Query belongs to the authorized project. As a result, an attacker can use permissions from Project A to delete shared/public Calendar or Team Planner views from Project B, causing integrity impact and limited availability impact for users relying on those shared views. This vulnerability is fixed in 17.3.3 and 17.4.1.

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: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
22nd
KEV
Not listed

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

The CVE record names the fixed release. Apply it within your standard update timelines.

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 26, 2026

Last Modified

June 29, 2026

Advisory Details (1)

Auto-updated Jun 26, 2026
Fix named in the CVE record. Sources: github.
GitHub advisoryMentions a patch (unverified)

Cross-project authorization bypass allows deleting public Calendar and Team Planner queries from unauthorized projects · Advisory · opf/openproject · GitHub

https://github.com/opf/openproject/security/advisories/GHSA-jrx5-px3f-vfq4

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 30× 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 138 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 38 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 19:41 UTCEG score recompute
  2. 2026-10-11 16:56 UTCEG score recompute
  3. 2026-10-11 14:19 UTCEG score recompute
  4. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  7. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  9. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  12. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  13. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  14. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  15. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  16. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  17. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  18. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  19. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  20. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  21. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  22. 2026-09-23 07:50 UTCEG score recompute
  23. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  24. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  25. 2026-09-18 07:12 UTCEG score recompute
Show 75 more
  1. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  2. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  3. 2026-09-14 01:03 UTCEG score recompute
  4. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  5. 2026-09-12 15:33 UTCEG score recompute
  6. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  7. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  8. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  9. 2026-09-06 15:59 UTCEG score recompute
  10. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  11. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  12. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  13. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  14. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  15. 2026-08-30 19:20 UTCEG score recompute
  16. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  17. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  18. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  19. 2026-08-27 23:02 UTCEG score recompute
  20. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  21. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  22. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  23. 2026-08-24 21:48 UTCEG score recompute
  24. 2026-08-23 13:57 UTCEG score recompute
  25. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  26. 2026-08-22 11:33 UTCEG score recompute
  27. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  28. 2026-08-21 09:09 UTCEG score recompute
  29. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  30. 2026-08-20 06:45 UTCEG score recompute
  31. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  32. 2026-08-18 23:43 UTCEG score recompute
  33. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  34. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  35. 2026-08-16 18:17 UTCEG score recompute
  36. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  37. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  38. 2026-08-15 14:59 UTCEG score recompute
  39. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  40. 2026-08-14 12:34 UTCEG score recompute
  41. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  42. 2026-08-13 10:10 UTCEG score recompute
  43. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  44. 2026-08-12 07:45 UTCEG score recompute
  45. 2026-08-11 05:21 UTCEG score recompute
  46. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  47. 2026-08-10 02:57 UTCEG score recompute
  48. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  49. 2026-08-09 00:33 UTCEG score recompute
  50. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  51. 2026-08-07 22:08 UTCEG score recompute
  52. 2026-08-06 19:44 UTCEG score recompute
  53. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  54. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  55. 2026-08-05 17:20 UTCEG score recompute
  56. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  57. 2026-08-04 14:56 UTCEG score recompute
  58. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  59. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  60. 2026-08-02 07:34 UTCEG score recompute
  61. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  62. 2026-08-01 05:09 UTCEG score recompute
  63. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  64. 2026-07-31 02:44 UTCEG score recompute
  65. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  66. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  67. 2026-07-28 20:24 UTCEG score recompute
  68. 2026-07-28 15:37 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  69. 2026-07-27 17:06 UTCEG score recompute
  70. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  71. 2026-07-26 14:32 UTCEG score recompute
  72. 2026-07-25 14:18 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  73. 2026-07-24 14:18 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  74. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  75. 2026-07-23 03:19 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-52779?
CVE-2026-52779 is a medium-severity vulnerability; its CVE record was published on June 26, 2026. OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, a cross-project IDOR / authorization context confusion in the Calendar and Team Planner modules allows a user with management permissions in one project to delete public Calendar or Team Planner Queries…
When was the CVE record for CVE-2026-52779 published?
The CVE record for CVE-2026-52779 was published on June 26, 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 June 29, 2026; the record at its source may have been updated since.
Is CVE-2026-52779 actively exploited?
CVE-2026-52779 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (22nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-52779?
CVE-2026-52779 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-2026-52779?
The CVE record for CVE-2026-52779 names the fix: "This vulnerability is fixed in 17.3.3 and 17.4.1."

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