CVE-2026-24708

HIGHPre-NVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-02-18. a secondary CVSS source baseline 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: None knownExposed: 0

A fix is available — apply it.

An issue was discovered in OpenStack Nova before 30.2.2, 31 before 31.2.1, and 32 before 32.1.1. By writing a malicious QCOW header to a root or ephemeral disk and then triggering a resize, a user may convince Nova's Flat image backend to call qemu-img without a format restriction, resulting in an unsafe image resize operation that could destroy data on the host system. Only compute nodes using the Flat image backend (usually configured with use_cow_images=False) are affected.

CVSS v3
8.2
EG Score
8.2(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity82% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

February 18, 2026

Last Modified

September 11, 2026

Advisory Details (3)

Auto-updated Jun 8, 2026
Patch available.
generic Patch Available

[SECURITY] [DLA 4486-1] nova security update

https://lists.debian.org/debian-lts-announce/2026/02/msg00025.html
generic

oss-security - [OSSA-2026-002] OpenStack Nova: calls qemu-img without format restrictions for resize (CVE-2026-24708) errata 1

https://www.openwall.com/lists/oss-security/2026/02/17/7
generic

Bug #2137507 “[OSSA-2026-002] Nova calls qemu-img without format...” : Bugs : OpenStack Compute (nova)

https://bugs.launchpad.net/nova/+bug/2137507

Vendor Advisories for CVE-2026-24708(3)

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

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython3-nova (3:29.2.0-0ubuntu1.3) @ noble2026-09-11ubuntu
redhattripleo-ansible-0:3.3.1-17.1.20260603190918.8debef3.el9ost2026-09-10redhat
redhatopenstack-nova-1:20.6.2-2.20260317135026.8a24acd.el8ost2026-08-13redhat
redhatopenstack-nova-1:27.5.2-18.0.20260312122217.c1c6d67.el9ost2026-04-29redhat
pipNova—ghsa

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
nova2:22.0.1-2, 2:22.0.1-2+deb11u1, 2:22.4.0-1~deb11u5, 2:22.4.0-1~deb11u62:22.4.0-1~deb11u7—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
nova2:26.1.0-4, 2:26.2.2-1~deb12u32:26.2.2-1~deb12u4—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
nova2:31.0.0-6, 2:31.0.0-6+deb13u12:31.0.0-6+deb13u2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
nova2:31.0.0-6 ... 2:32.1.0-6 (12 versions)2:32.1.0-7—
PyPI(1)
PackageVulnerable rangeFixed inDependents
nova15.1.5 ... 32.1.0 (134 versions)——

Weakness Classification(2)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 5× in last 7d / 30× 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 218 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-24708?
CVE-2026-24708 is a high vulnerability published on February 18, 2026. An issue was discovered in OpenStack Nova before 30.2.2, 31 before 31.2.1, and 32 before 32.1.1. By writing a malicious QCOW header to a root or ephemeral disk and then triggering a resize, a user may convince Nova's Flat image backend to call qemu-img without a format restriction, resulting in an…
When was CVE-2026-24708 disclosed?
CVE-2026-24708 was first published in the National Vulnerability Database on February 18, 2026, with the most recent update on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-24708 actively exploited?
CVE-2026-24708 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 68.1% of all scored CVEs.
What is the CVSS score of CVE-2026-24708?
CVE-2026-24708 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-24708?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-24708, 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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