CVE-2026-62435

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-07-28. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]

With the introduction of Grant Table v2 came the requirement to be able to switch between versions. Switching from v1 to v2 reduces the number of valid grant references, as a bigger shared entry structure is then needed while the shared table doesn't change size. Switching from v2 back to v1 the status frames, which are separate in v2, go away.

Code holding, but intermediately dropping and then re-acquiring the grant table lock, sometimes wrongly assumes that said properties wouldn't change across the window in time where the lock is not being held.

The v1 -> v2 issue is CVE-2026-62435.

The v2 -> v1 issue is CVE-2026-62436.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

July 28, 2026

Last Modified

July 28, 2026

Advisory Details (1)

Auto-updated Jul 28, 2026
No patch confirmed yet.
generic

XSA-501 - Xen Security Advisories

https://xenbits.xenproject.org/xsa/advisory-501.html

Vendor Advisories for CVE-2026-62435(1)

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

Affected Packages

(8 across 8 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
xen—4.19.6-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
xen—4.20.4-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
xen—4.20.4-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
xen—4.21.2-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
xen4.14.2+25-gb6a8c4f72d-2 ... 4.20.3+127-gc42374a105-1 (46 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
xen4.17.1+2-gb773c48e36-1 ... 4.20.3+127-gc42374a105-1 (25 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
xen4.20.0+68-g35cb38b222-1 ... 4.20.2+7-g1badcf5035-2 (6 versions)4.20.3+127-gc42374a105-0+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
xen4.20.0+68-g35cb38b222-1, 4.20.2+37-g61ff35323e-1, 4.20.2+7-g1badcf5035-1, 4.20.2+7-g1badcf5035-24.20.3+127-gc42374a105-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 67× 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 140 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-62435?
CVE-2026-62435 is a medium vulnerability published on July 28, 2026. [This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] With the introduction of Grant Table v2 came the requirement to be able to switch between versions. Switching from v1 to v2 reduces the number of valid grant references,…
When was CVE-2026-62435 disclosed?
CVE-2026-62435 was first published in the National Vulnerability Database on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-62435 actively exploited?
CVE-2026-62435 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 91.3% of all scored CVEs.
What is the CVSS score of CVE-2026-62435?
CVE-2026-62435 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-62435?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62435, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-62435

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