CVE-2026-43909

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 70% 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
Elevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, a signed 32-bit integer overflow in the loop index expression i * 4 inside SwapRGBABytes() causes the function to compute a large negative pointer offset when processing kABGR DPX images with large dimensions. The immediate crash is an out-of-bounds read (the memcpy at line 45 reads from &input[i * 4] first), but the subsequent write operations at lines 46–49 target the same wrapped offset — making this a combined OOB read+write primitive. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: 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
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

May 14, 2026

Last Modified

May 15, 2026

Advisory Details (1)

Auto-updated May 14, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Signed integer overflow in SwapRGBABytes loop index leads to out-of-bounds read/write in DPX ABGR decoder · Advisory · AcademySoftwareFoundation/OpenImageIO · GitHub

https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-g267-j53j-5258

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython3-openimageio (2.1.12.0~dfsg0-1ubuntu0.1~esm1) @ focal2026-08-23ubuntu

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
openimageio2.2.10.1+dfsg-1 ... 2.5.7.0+dfsg-1 (43 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
openimageio2.4.12.0+dfsg-1 ... 2.5.7.0+dfsg-1 (18 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
openimageio2.5.18.0+dfsg-1, 2.5.19.1+dfsg-1, 2.5.19.1+dfsg-2——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
openimageio2.5.18.0+dfsg-1, 2.5.19.1+dfsg-1, 2.5.19.1+dfsg-2——

Weakness Classification(3)

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-43909?
CVE-2026-43909 is a high vulnerability published on May 14, 2026. OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, a signed 32-bit integer overflow in the loop index expression i 4 inside SwapRGBABytes() causes the function to compute a large negative…
When was CVE-2026-43909 disclosed?
CVE-2026-43909 was first published in the National Vulnerability Database on May 14, 2026, with the most recent update on May 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43909 actively exploited?
CVE-2026-43909 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 69.0% of all scored CVEs.
What is the CVSS score of CVE-2026-43909?
CVE-2026-43909 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-43909?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43909, 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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