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) @ focal2026-09-19ubuntu

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 26× in last 7d / 112× 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 259 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 87.8% 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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