CVE-2026-76827

MEDIUMPre-NVD 6.86.8—
EchelonGraph scoreHIGH confidence

Score 6.8 from GitHub Security Advisory published 2026-08-19. a secondary CVSS source baseline 6.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.8Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in search-indexer. This vulnerability allows a registered and authenticated managed cluster to tamper with or delete another cluster's indexed search data. This is possible because the delta-sync write paths in search-indexer do not properly restrict UPDATE/DELETE operations to data owned by the calling cluster. An attacker could exploit this by crafting specific user identifiers (UIDs) with a different cluster's prefix.

CVSS v3
6.8
EG Score
6.8(high)
EG Risk
31(Track)
EG Risk 31/100SSVC: 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
Severity68% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

August 19, 2026

Last Modified

September 5, 2026

Advisory Details (2)

Auto-updated Aug 19, 2026
Patch available. Sources: redhat.
redhat

2519896 – (CVE-2026-76827) CVE-2026-76827 search-indexer: search-indexer: UPDATE/DELETE operations not scoped to caller's cluster (cross-tenant data tampering)

https://bugzilla.redhat.com/show_bug.cgi?id=2519896
redhat Patch Available

CVE-2026-76827 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-76827

Vendor Advisories for CVE-2026-76827(7)

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

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhacm2/acm-search-indexer-rhel9:17876889572026-08-26redhat
redhatrhacm2/acm-search-indexer-rhel9:17872500742026-08-26redhat
redhatrhacm2/acm-search-indexer-rhel9:17872484912026-08-26redhat
redhatrhacm2/acm-search-indexer-rhel9:17872624742026-08-26redhat
redhatrhacm2/acm-search-indexer-rhel9:17872492932026-08-26redhat
redhatrhacm2/acm-search-indexer-rhel9:17872470852026-08-26redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 127× 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 130 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-76827?
CVE-2026-76827 is a medium vulnerability published on August 19, 2026. A flaw was found in search-indexer. This vulnerability allows a registered and authenticated managed cluster to tamper with or delete another cluster's indexed search data. This is possible because the delta-sync write paths in search-indexer do not properly restrict UPDATE/DELETE operations to…
When was CVE-2026-76827 disclosed?
CVE-2026-76827 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on September 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76827 actively exploited?
CVE-2026-76827 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 75.3% of all scored CVEs.
What is the CVSS score of CVE-2026-76827?
CVE-2026-76827 has a CVSS v3 base score of 6.8 (NVD).
How do I remediate CVE-2026-76827?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-76827, 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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