OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. OpenEXR versions before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13 are vulnerable on ILP32 builds to an out-of-bounds read. The vulnerability is reached when a crafted uncompressed deep-tile EXR causes the sample-count table size calculation in OpenEXRCore decoding.c to wrap before unpack_sample_table() iterates over the full attacker-controlled tile dimensions, allowing denial of service. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.
CVE-2026-59983
MEDIUMPre-NVD 5.55.5—Trending — 3 sources updated this weekElevated
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 5.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 92% 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
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.5
- EG Score
- 5.5(medium)
- EG Risk
- 41(Track)EG Risk 41/100SSVC: 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 computedSeverity55% × 45%Exploitation40% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 8%
- KEV
- Not listed
Published
August 25, 2026
Last Modified
August 25, 2026
Advisory Details (4)
Auto-updated Aug 25, 2026🔬 Proof of concept available. Patch available. Sources: github, github_commit.
github Patch Available🟡 PoC Available
ILP32 DeepTiledInputFile sample count table decode OOB read · Advisory · AcademySoftwareFoundation/openexr · GitHub
https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-p42q-g5c9-mh9wgithub_commit Patch Available
commit f0e404f7298c (AcademySoftwareFoundation/openexr)
Patch available: AcademySoftwareFoundation/openexr v3.3.13 (contains commit f0e404f7298c)
https://github.com/AcademySoftwareFoundation/openexr/commit/f0e404f7298cd8563a1d30a64a1c982dbd68fc49github_commit Patch Available
commit 78e91146fcee (AcademySoftwareFoundation/openexr)
Patch available: AcademySoftwareFoundation/openexr v3.2.11 (contains commit 78e91146fcee)
https://github.com/AcademySoftwareFoundation/openexr/commit/78e91146fceeee317820a146ba99a96f380945b8github_commit Patch Available
commit 0efec58d2d28 (AcademySoftwareFoundation/openexr)
Patch available: AcademySoftwareFoundation/openexr v3.4.14 (contains commit 0efec58d2d28)
https://github.com/AcademySoftwareFoundation/openexr/commit/0efec58d2d28a0ee322f5028dee6fb57d459580eWeakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 12× in last 7d / 12× 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.
- 2026-08-30 02:32 UTCEG score recompute
- 2026-08-30 01:22 UTCEPSS rescore
- 2026-08-29 00:46 UTCEG score recompute
- 2026-08-28 21:42 UTCEPSS rescore
- 2026-08-27 22:55 UTCEG score recompute
- 2026-08-27 14:25 UTCEPSS rescore
- 2026-08-26 21:09 UTCEG score recompute
- 2026-08-26 14:46 UTCEPSS rescore
- 2026-08-25 19:20 UTCEG score recompute
- 2026-08-25 18:50 UTCEG score recompute
- 2026-08-25 18:19 UTCEG score recompute
- 2026-08-25 18:19 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-125
- CVE-2013-0767EG 10.0EPSS p93HIGH
- CVE-2009-2523EG 10.0EPSS p98HIGH
- CVE-2014-2898EG 9.8CRITICAL
- CVE-2014-2897EG 9.8CRITICAL
- CVE-2014-2896EG 9.8CRITICAL
- CVE-1999-0006EG 9.8EPSS p96CRITICAL
- CVE-2014-1522EG 9.3EPSS p92HIGH
- CVE-2013-0779EG 9.3EPSS p92HIGH
- CVE-2013-0778EG 9.3EPSS p90HIGH
- CVE-2012-3995EG 9.3EPSS p92HIGH
Frequently asked(5)
What is CVE-2026-59983?
CVE-2026-59983 is a medium vulnerability published on August 25, 2026. OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. OpenEXR versions before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13 are vulnerable on ILP32 builds to an out-of-bounds read. The vulnerability is reached when a…
When was CVE-2026-59983 disclosed?
CVE-2026-59983 was first published in the National Vulnerability Database on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59983 actively exploited?
CVE-2026-59983 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 92.4% of all scored CVEs.
What is the CVSS score of CVE-2026-59983?
CVE-2026-59983 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-59983?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59983, 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
Explore the affected products and dependency analysis for CVE-2026-59983
Is Your Infrastructure Affected by CVE-2026-59983?
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