CVE-2026-8933

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-21. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

A local privilege escalation vulnerability exists in snap-confine, a set-capabilities core component used internally by Canonical snapd to construct the secure execution environment for snap applications. This vulnerability uniquely affects versions of snap-confine configured with set-capabilities (rather than standard set-uid-root installations). Due to a flaw in how privilege boundaries or security sandboxes are initialized when the binary runs under limited ambient capabilities, a local, unprivileged attacker can exploit this behavior to bypass intended restrictions and execute arbitrary code. Successful exploitation allows the local user to elevate their privileges to full root authority.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 22, 2026

References (1)

Vendor Advisories for CVE-2026-8933(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuubuntu-snappy-cli (2.67.1+20.04ubuntu1~esm3) @ focal2026-09-11ubuntu

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.

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
snapd2.68.3-3 ... 2.76.3-2 (14 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
snapd2.68.3-3 ... 2.76-1 (11 versions)2.76.3-1—

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 22× in last 7d / 124× 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 227 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-8933?
CVE-2026-8933 is a high vulnerability published on July 21, 2026. A local privilege escalation vulnerability exists in snap-confine, a set-capabilities core component used internally by Canonical snapd to construct the secure execution environment for snap applications. This vulnerability uniquely affects versions of snap-confine configured with set-capabilities…
When was CVE-2026-8933 disclosed?
CVE-2026-8933 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8933 actively exploited?
CVE-2026-8933 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 88.1% of all scored CVEs.
What is the CVSS score of CVE-2026-8933?
CVE-2026-8933 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-8933?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8933, 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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