CVE-2026-21579

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-21. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

This High severity Information Disclosure vulnerability was introduced in versions 7.17.0, 7.19.0, 8.5.0, 8.9.0, 9.0.1, 9.1.0, 9.2.0, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center. This Information Disclosure vulnerability, with a CVSS Score of 8.2, allows an unauthenticated attacker to view sensitive information via an Information Disclosure vulnerability. Atlassian recommends that Confluence Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions: Confluence Data Center 9.2: Upgrade to a release greater than or equal to 9.2.22 Confluence Data Center 10.2: Upgrade to a release greater than or equal to 10.2.14 See the release notes ([https://confluence.atlassian.com/doc/confluence-release-notes-327.html]). You can download the latest version of Confluence Data Center from the download center ([https://www.atlassian.com/software/confluence/download-archives]). This vulnerability was reported via our Atlassian (Internal) program.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

July 21, 2026

Last Modified

August 11, 2026

Advisory Details (2)

Auto-updated Jul 21, 2026
No patch confirmed yet.
generic

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https://jira.atlassian.com/browse/CONFSERVER-104340
generic

Security Bulletin - July 21 2026 | Atlassian Support | Atlassian Documentation

https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999345

Vendor Advisories for CVE-2026-21579(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 18× in last 7d / 106× 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 138 total refreshes for this CVE.

  1. 2026-08-30 02:15 UTCEG score recompute
  2. 2026-08-30 02:15 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-28 21:41 UTCEPSS rescore
  5. 2026-08-28 02:49 UTCGHSA enrichment
  6. 2026-08-27 13:48 UTCGHSA enrichment
  7. 2026-08-27 00:47 UTCEG score recompute
  8. 2026-08-27 00:47 UTCGHSA enrichment
  9. 2026-08-26 14:46 UTCEPSS rescore
  10. 2026-08-26 11:46 UTCGHSA enrichment
  11. 2026-08-25 22:43 UTCEG score recompute
  12. 2026-08-25 22:43 UTCGHSA enrichment
  13. 2026-08-25 13:48 UTCEPSS rescore
  14. 2026-08-25 09:41 UTCGHSA enrichment
  15. 2026-08-24 20:40 UTCEG score recompute
  16. 2026-08-24 20:40 UTCGHSA enrichment
  17. 2026-08-24 07:38 UTCGHSA enrichment
  18. 2026-08-23 18:15 UTCGHSA enrichment
  19. 2026-08-23 05:14 UTCEG score recompute
  20. 2026-08-23 05:14 UTCGHSA enrichment
  21. 2026-08-23 00:19 UTCEPSS rescore
  22. 2026-08-22 16:12 UTCGHSA enrichment
  23. 2026-08-22 03:02 UTCEG score recompute
  24. 2026-08-22 03:02 UTCGHSA enrichment
  25. 2026-08-21 23:49 UTCEPSS rescore
Show 75 more
  1. 2026-08-21 13:59 UTCGHSA enrichment
  2. 2026-08-21 00:38 UTCEG score recompute
  3. 2026-08-21 00:38 UTCGHSA enrichment
  4. 2026-08-20 22:55 UTCEPSS rescore
  5. 2026-08-20 11:37 UTCGHSA enrichment
  6. 2026-08-19 22:36 UTCEG score recompute
  7. 2026-08-19 22:36 UTCGHSA enrichment
  8. 2026-08-19 17:03 UTCEPSS rescore
  9. 2026-08-19 08:35 UTCGHSA enrichment
  10. 2026-08-18 19:31 UTCEG score recompute
  11. 2026-08-18 19:31 UTCGHSA enrichment
  12. 2026-08-18 13:48 UTCEPSS rescore
  13. 2026-08-18 02:39 UTCEG score recompute
  14. 2026-08-18 02:39 UTCGHSA enrichment
  15. 2026-08-17 13:47 UTCEPSS rescore
  16. 2026-08-17 13:37 UTCGHSA enrichment
  17. 2026-08-17 00:36 UTCEG score recompute
  18. 2026-08-17 00:36 UTCGHSA enrichment
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 11:34 UTCEG score recompute
  21. 2026-08-16 11:34 UTCGHSA enrichment
  22. 2026-08-16 02:14 UTCEPSS rescore
  23. 2026-08-15 22:34 UTCGHSA enrichment
  24. 2026-08-15 09:33 UTCEG score recompute
  25. 2026-08-15 09:33 UTCGHSA enrichment
  26. 2026-08-15 01:30 UTCEPSS rescore
  27. 2026-08-14 20:31 UTCGHSA enrichment
  28. 2026-08-14 07:30 UTCEG score recompute
  29. 2026-08-14 07:30 UTCGHSA enrichment
  30. 2026-08-13 22:00 UTCEPSS rescore
  31. 2026-08-13 18:29 UTCGHSA enrichment
  32. 2026-08-13 05:28 UTCGHSA enrichment
  33. 2026-08-12 16:26 UTCEG score recompute
  34. 2026-08-12 16:26 UTCGHSA enrichment
  35. 2026-08-12 13:50 UTCEPSS rescore
  36. 2026-08-12 03:25 UTCGHSA enrichment
  37. 2026-08-11 14:23 UTCEG score recompute
  38. 2026-08-11 14:23 UTCGHSA enrichment
  39. 2026-08-11 13:42 UTCEPSS rescore
  40. 2026-08-11 01:22 UTCEG score recompute▼ 0.70
  41. 2026-08-11 01:22 UTCGHSA enrichment
  42. 2026-08-11 01:21 UTCNVD updateCVSS v3 → 7.5
  43. 2026-08-11 00:00 UTCEPSS rescore
  44. 2026-08-10 16:03 UTCGHSA enrichment
  45. 2026-08-10 02:26 UTCEG score recompute
  46. 2026-08-10 02:26 UTCGHSA enrichment
  47. 2026-08-09 13:46 UTCEPSS rescore
  48. 2026-08-09 13:25 UTCGHSA enrichment
  49. 2026-08-09 00:24 UTCEG score recompute
  50. 2026-08-09 00:24 UTCGHSA enrichment
  51. 2026-08-08 16:37 UTCEPSS rescore
  52. 2026-08-08 11:22 UTCGHSA enrichment
  53. 2026-08-07 22:21 UTCEG score recompute
  54. 2026-08-07 22:21 UTCGHSA enrichment
  55. 2026-08-07 09:20 UTCGHSA enrichment
  56. 2026-08-06 20:19 UTCEG score recompute
  57. 2026-08-06 20:19 UTCGHSA enrichment
  58. 2026-08-06 13:46 UTCEPSS rescore
  59. 2026-08-06 07:18 UTCEG score recompute
  60. 2026-08-06 07:18 UTCGHSA enrichment
  61. 2026-08-05 19:17 UTCEPSS rescore
  62. 2026-08-05 18:17 UTCGHSA enrichment
  63. 2026-08-05 05:16 UTCGHSA enrichment
  64. 2026-08-04 16:09 UTCEG score recompute
  65. 2026-08-04 16:09 UTCGHSA enrichment
  66. 2026-08-04 15:10 UTCEPSS rescore
  67. 2026-08-04 10:38 UTCEPSS rescore
  68. 2026-08-04 03:08 UTCGHSA enrichment
  69. 2026-08-03 14:07 UTCEG score recompute
  70. 2026-08-03 14:06 UTCGHSA enrichment
  71. 2026-08-03 10:35 UTCEPSS rescore
  72. 2026-08-03 01:05 UTCGHSA enrichment
  73. 2026-08-02 12:04 UTCEG score recompute
  74. 2026-08-02 12:03 UTCGHSA enrichment
  75. 2026-08-02 02:26 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-21579?
CVE-2026-21579 is a high vulnerability published on July 21, 2026. This High severity Information Disclosure vulnerability was introduced in versions 7.17.0, 7.19.0, 8.5.0, 8.9.0, 9.0.1, 9.1.0, 9.2.0, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center. This Information Disclosure vulnerability, with a CVSS Score of 8.2, allows an unauthenticated attacker to view…
When was CVE-2026-21579 disclosed?
CVE-2026-21579 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on August 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21579 actively exploited?
CVE-2026-21579 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 82.7% of all scored CVEs.
What is the CVSS score of CVE-2026-21579?
CVE-2026-21579 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-21579?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-21579, 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

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