CVE-2026-34588

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 60% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 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.

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.1.0 to before 3.2.7, 3.3.9, and 3.4.9, internal_exr_undo_piz() advances the working wavelet pointer with signed 32-bit arithmetic. Because nx, ny, and wcount are int, a crafted EXR file can make this product overflow and wrap. The next channel then decodes from an incorrect address. The wavelet decode path operates in place, so this yields both out-of-bounds reads and out-of-bounds writes. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.

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
40%
KEV
Not listed

Published

April 6, 2026

Last Modified

September 9, 2026

Advisory Details (4)

Auto-updated Jun 11, 2026
Patch available. Sources: github_release, github.
github Patch Available

Signed 32-bit Overflow in PIZ Decoder Leads to OOB Read/Write · Advisory · AcademySoftwareFoundation/openexr · GitHub

https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-588r-cr5c-w6hf
github_release Patch Available

v3.4.9

Patch available: AcademySoftwareFoundation/openexr v3.4.9

https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9
github_release Patch Available

v3.3.9

Patch available: AcademySoftwareFoundation/openexr v3.3.9

https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9
github_release Patch Available

v3.2.7

Patch available: AcademySoftwareFoundation/openexr v3.2.7

https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7

Vendor Advisories for CVE-2026-34588(4)

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

Patch Availability(14)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuopenexr-doc (2.2.0-10ubuntu2.6+esm4) @ xenial2026-09-09ubuntu
redhatrhaiis/vllm-spyre-rhel9:17823529192026-06-25redhat
redhatrhaiis/model-opt-cuda-rhel9:17823529502026-06-25redhat
redhatrhaiis/vllm-cuda-rhel9:17823528472026-06-25redhat
redhatrhaiis/vllm-rocm-rhel9:17823530932026-06-25redhat
redhatopenexr-0:3.1.1-2.el9_0.32026-05-20redhat
redhatopenexr-0:3.1.10-8.el10_2.22026-05-19redhat
redhatopenexr-0:3.1.1-3.el9_8.22026-05-19redhat
redhatopenexr-0:3.1.1-2.el9_2.32026-05-14redhat
redhatopenexr-0:3.1.1-2.el9_4.32026-05-14redhat
redhatopenexr-0:3.1.10-8.el10_0.22026-05-14redhat
redhatopenexr-0:3.1.1-3.el9_6.22026-05-14redhat
redhatopenexr-0:3.1.1-3.el9_7.22026-05-11redhat
redhatopenexr-0:3.1.10-8.el10_1.22026-05-11redhat

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
openexr2.5.4-2 ... 3.4.6+ds-4 (19 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
openexr3.1.13-1 ... 3.4.6+ds-4 (10 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
openexr3.1.13-2 ... 3.4.6+ds-4 (6 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
openexr3.1.13-2, 3.4.6+ds-1, 3.4.6+ds-2, 3.4.6+ds-3, 3.4.6+ds-43.4.14-0.1—
PyPI(1)
PackageVulnerable rangeFixed inDependents
openexr3.2.3 ... 3.4.8 (22 versions)3.4.9—

Weakness Classification(3)

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

Additional Vendor Advisories

(10)

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 9× in last 7d / 31× 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 185 total refreshes for this CVE.

  1. 2026-09-15 03:11 UTCEPSS rescore
  2. 2026-09-13 16:47 UTCEPSS rescore
  3. 2026-09-12 15:01 UTCEPSS rescore
  4. 2026-09-11 14:53 UTCEPSS rescore
  5. 2026-09-11 09:37 UTCEPSS rescore
  6. 2026-09-10 09:34 UTCEPSS rescore
  7. 2026-09-09 12:40 UTCEG score recompute
  8. 2026-09-09 12:40 UTCVendor advisory
  9. 2026-09-08 22:00 UTCEPSS rescore
  10. 2026-09-07 16:01 UTCEPSS rescore
  11. 2026-09-06 13:47 UTCEPSS rescore
  12. 2026-09-04 05:06 UTCEPSS rescore
  13. 2026-09-02 14:12 UTCEPSS rescore
  14. 2026-09-02 09:44 UTCOSV refresh
  15. 2026-09-01 13:53 UTCEPSS rescore
  16. 2026-09-01 04:39 UTCEPSS rescore
  17. 2026-08-30 19:17 UTCEPSS rescore
  18. 2026-08-30 01:22 UTCEPSS rescore
  19. 2026-08-28 21:41 UTCEPSS rescore
  20. 2026-08-27 14:25 UTCEPSS rescore
  21. 2026-08-26 14:46 UTCEPSS rescore
  22. 2026-08-25 13:49 UTCEPSS rescore
  23. 2026-08-23 00:19 UTCEPSS rescore
  24. 2026-08-21 23:49 UTCEPSS rescore
  25. 2026-08-20 22:55 UTCEPSS rescore
Show 75 more
  1. 2026-08-19 17:03 UTCEPSS rescore
  2. 2026-08-18 13:48 UTCEPSS rescore
  3. 2026-08-17 13:47 UTCEPSS rescore
  4. 2026-08-16 14:56 UTCEPSS rescore
  5. 2026-08-16 08:24 UTCEG score recompute
  6. 2026-08-16 08:24 UTCVendor advisory
  7. 2026-08-16 02:14 UTCEPSS rescore
  8. 2026-08-15 01:30 UTCEPSS rescore
  9. 2026-08-14 18:46 UTCVendor advisory
  10. 2026-08-14 05:33 UTCEG score recompute
  11. 2026-08-14 05:33 UTCVendor advisory
  12. 2026-08-13 22:00 UTCEPSS rescore
  13. 2026-08-13 09:44 UTCVendor advisory
  14. 2026-08-12 19:47 UTCEG score recompute
  15. 2026-08-12 19:47 UTCVendor advisory
  16. 2026-08-12 13:50 UTCEPSS rescore
  17. 2026-08-11 19:56 UTCEG score recompute
  18. 2026-08-11 19:56 UTCVendor advisory
  19. 2026-08-11 03:18 UTCEG score recompute
  20. 2026-08-11 03:18 UTCVendor advisory
  21. 2026-08-11 00:00 UTCEPSS rescore
  22. 2026-08-10 04:23 UTCVendor advisory
  23. 2026-08-09 16:44 UTCEG score recompute
  24. 2026-08-09 16:44 UTCVendor advisory
  25. 2026-08-09 13:46 UTCEPSS rescore
  26. 2026-08-09 05:03 UTCVendor advisory
  27. 2026-08-08 02:46 UTCEG score recompute
  28. 2026-08-08 02:46 UTCVendor advisory
  29. 2026-08-07 15:07 UTCEG score recompute
  30. 2026-08-07 15:07 UTCVendor advisory
  31. 2026-08-06 13:46 UTCEPSS rescore
  32. 2026-08-06 13:02 UTCVendor advisory
  33. 2026-08-06 00:08 UTCEG score recompute
  34. 2026-08-06 00:08 UTCVendor advisory
  35. 2026-08-05 19:17 UTCEPSS rescore
  36. 2026-08-04 15:10 UTCEPSS rescore
  37. 2026-08-04 10:38 UTCEPSS rescore
  38. 2026-08-03 22:28 UTCEG score recompute
  39. 2026-08-03 22:28 UTCVendor advisory
  40. 2026-08-03 10:36 UTCEPSS rescore
  41. 2026-08-03 02:15 UTCVendor advisory
  42. 2026-08-02 14:25 UTCEG score recompute
  43. 2026-08-02 14:25 UTCVendor advisory
  44. 2026-08-02 02:27 UTCEPSS rescore
  45. 2026-08-01 04:16 UTCEPSS rescore
  46. 2026-07-30 16:28 UTCEPSS rescore
  47. 2026-07-30 01:30 UTCEPSS rescore
  48. 2026-07-27 14:13 UTCEPSS rescore
  49. 2026-07-26 14:54 UTCEPSS rescore
  50. 2026-07-26 14:54 UTCEPSS rescore
  51. 2026-07-25 14:18 UTCEPSS rescore
  52. 2026-07-25 14:18 UTCEPSS rescore
  53. 2026-07-24 14:17 UTCEPSS rescore
  54. 2026-07-24 14:17 UTCEPSS rescore
  55. 2026-07-23 14:18 UTCEPSS rescore
  56. 2026-07-23 14:18 UTCEPSS rescore
  57. 2026-07-23 03:09 UTCEG score recompute
  58. 2026-07-22 14:08 UTCEPSS rescore
  59. 2026-07-21 15:24 UTCEPSS rescore
  60. 2026-07-20 17:08 UTCEPSS rescore
  61. 2026-07-19 14:31 UTCEPSS rescore
  62. 2026-07-19 02:29 UTCEPSS rescore
  63. 2026-07-18 10:04 UTCEPSS rescore
  64. 2026-07-17 02:24 UTCOSV refresh
  65. 2026-07-16 17:03 UTCEPSS rescore
  66. 2026-07-15 16:57 UTCEPSS rescore
  67. 2026-07-15 16:57 UTCEPSS rescore
  68. 2026-07-15 02:23 UTCNVD updateCVSS v3 → 7.8
  69. 2026-07-15 02:00 UTCEPSS rescore
  70. 2026-07-15 01:21 UTCMITRE cvelistV5CVSS v3 → 8.8
  71. 2026-07-13 22:30 UTCEPSS rescore
  72. 2026-07-13 06:13 UTCEPSS rescore
  73. 2026-07-13 06:13 UTCEPSS rescore
  74. 2026-07-12 05:46 UTCEPSS rescore
  75. 2026-07-11 08:27 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-34588?
CVE-2026-34588 is a high vulnerability published on April 6, 2026. OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.1.0 to before 3.2.7, 3.3.9, and 3.4.9, internalexrundo_piz() advances the working wavelet pointer with signed 32-bit arithmetic. Because nx, ny,…
When was CVE-2026-34588 disclosed?
CVE-2026-34588 was first published in the National Vulnerability Database on April 6, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34588 actively exploited?
CVE-2026-34588 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 59.8% of all scored CVEs.
What is the CVSS score of CVE-2026-34588?
CVE-2026-34588 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-34588?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34588, 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-2026-34588

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