CVE-2026-76827

MEDIUMPre-NVD 6.86.8—
EchelonGraph scoreMEDIUM 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: 0.5%CVSS: 6.8Exploit: None knownExposed services: Not assessed

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
6.8MEDIUMmedium confidence
EG Risk
31
EG Risk 31/100CISA SSVC

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%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

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
redhatMentions a patch (unverified)

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 / EcosystemFix (by version range) / 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 18× in last 7d / 99× 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 199 total refreshes for this CVE.

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

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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 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 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-76827?
CVE-2026-76827 has a CVSS base score of 6.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-76827?
A fix for CVE-2026-76827 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-76827 are linked in the Vendor Advisories panel on this page.

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