CVE-2026-63419

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 93% 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, secondary
Trending — 3 sources updated this weekElevated
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: Elevated riskExposed: 0

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

OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1, A zbuffer-only tiled iff is exposed with a 16-bit public imagespec while the decoder retains a 32-bit internal pixel size. iffinput::read_native_tile() copies according to m_header.pixel_bytes() rather than imagespec::tile_bytes(true), and a failed read can leave m_buf nonempty so a later call copies partially initialized data into the undersized caller buffer, resulting in a heap out-of-bounds write and memory corruption. The affected implementation is identified by src/iff.imageio/iffinput.cpp, IffInput::read_native_tile(), ImageSpec::tile_bytes(true), m_header.pixel_bytes(), ZBUFFER, and m_buf, which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
51(Track*)
EG Risk 51/100SSVC: 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%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

September 18, 2026

Last Modified

September 24, 2026

Advisory Details (5)

Auto-updated Sep 18, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

v3.1.16.0

Patch available: AcademySoftwareFoundation/OpenImageIO v3.1.16.0

https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0
github_release Patch Available

v3.0.21.0

Patch available: AcademySoftwareFoundation/OpenImageIO v3.0.21.0

https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.21.0
github_commit

commit 9cda48b15029 (AcademySoftwareFoundation/OpenImageIO)

Fix landed in AcademySoftwareFoundation/OpenImageIO commit 9cda48b15029 — awaiting tagged release

https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/9cda48b150294c7f024e680a6c9b0402e50f4816
github_pr

fix(iff): detect corrupt chunk sizes, flags, channel configs

Fix merged in AcademySoftwareFoundation/OpenImageIO PR #5268 on 2026-07-02 — awaiting tagged release

https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5268
github Patch Available🟡 PoC Available

IFF ZBUFFER tile read writes past caller tile buffer · Advisory · AcademySoftwareFoundation/OpenImageIO · GitHub

https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-w6wc-gcf4-5pj2

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 13× 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.

  1. 2026-09-24 15:04 UTCEG score recompute
  2. 2026-09-24 03:14 UTCEG score recompute
  3. 2026-09-23 17:54 UTCEPSS rescore
  4. 2026-09-22 16:16 UTCEG score recompute
  5. 2026-09-22 04:36 UTCEG score recompute
  6. 2026-09-21 04:51 UTCEG score recompute
  7. 2026-09-20 20:16 UTCEPSS rescore
  8. 2026-09-19 17:47 UTCEG score recompute
  9. 2026-09-18 18:28 UTCEG score recompute
  10. 2026-09-18 17:44 UTCEG score recompute
  11. 2026-09-18 16:26 UTCEG score recompute
  12. 2026-09-18 15:55 UTCEG score recompute
  13. 2026-09-18 15:54 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-63419?
CVE-2026-63419 is a high vulnerability published on September 18, 2026. OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1, A zbuffer-only tiled iff is exposed with a 16-bit public imagespec while the decoder retains a 32-bit internal pixel…
When was CVE-2026-63419 disclosed?
CVE-2026-63419 was first published in the National Vulnerability Database on September 18, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63419 actively exploited?
CVE-2026-63419 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 92.7% of all scored CVEs.
What is the CVSS score of CVE-2026-63419?
CVE-2026-63419 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-63419?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63419, 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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