OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions 3.1.0 through 3.2.10, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, an int32_t multiplication in OpenEXRCore's unpack_sample_table() can overflow while decoding a crafted deep tiled EXR file, producing an invalid pointer that leads to a read from an unmapped memory address and a crash. Because the overflow occurs in the standard decoding path (exr_decoding_run), any application that decodes deep tiled EXR files is affected. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.
CVE-2026-59183
MEDIUMPre-NVD 5.55.5—Trending — 3 sources updated this week
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 94% 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: None knownExposed: 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
- 25(Track)EG Risk 25/100SSVC: 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%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 6%
- 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_commit, github.
github Patch Available🟡 PoC Available
Signed Integer Overflow Leading to Out-of-Bounds Memory Access in Deep Tile Decoding · Advisory · AcademySoftwareFoundation/openexr · GitHub
https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-rqp5-pmwm-wj6xgithub_commit Patch Available
commit e2adb5be3bbc (AcademySoftwareFoundation/openexr)
Patch available: AcademySoftwareFoundation/openexr v3.2.11 (contains commit e2adb5be3bbc)
https://github.com/AcademySoftwareFoundation/openexr/commit/e2adb5be3bbc3a1f82f2bc06cc9699995a99a607github_commit Patch Available
commit a6cf183725b5 (AcademySoftwareFoundation/openexr)
Patch available: AcademySoftwareFoundation/openexr v3.3.13 (contains commit a6cf183725b5)
https://github.com/AcademySoftwareFoundation/openexr/commit/a6cf183725b5665ac3fdbec640125fba5ee1ab39github_commit Patch Available
commit 5e55a64ad1f1 (AcademySoftwareFoundation/openexr)
Patch available: AcademySoftwareFoundation/openexr v3.4.14 (contains commit 5e55a64ad1f1)
https://github.com/AcademySoftwareFoundation/openexr/commit/5e55a64ad1f119a8166542f4b6e034c31b7e043aWeakness 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.
- 2026-08-29 01:09 UTCEG score recompute
- 2026-08-28 21:42 UTCEPSS rescore
- 2026-08-27 23:13 UTCEG score recompute
- 2026-08-27 14:25 UTCEPSS rescore
- 2026-08-26 21:18 UTCEG score recompute
- 2026-08-26 14:46 UTCEPSS rescore
- 2026-08-25 19:21 UTCEG score recompute
- 2026-08-25 19:10 UTCEG score recompute
- 2026-08-25 13:49 UTCEPSS rescore
- 2026-08-25 01:19 UTCEG score recompute
- 2026-08-25 01:10 UTCEG score recompute
- 2026-08-25 01:10 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-190
Frequently asked(5)
What is CVE-2026-59183?
CVE-2026-59183 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. In versions 3.1.0 through 3.2.10, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, an int32t multiplication in OpenEXRCore's unpacksampletable() can overflow while decoding…
When was CVE-2026-59183 disclosed?
CVE-2026-59183 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-2026-59183 actively exploited?
CVE-2026-59183 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 93.7% of all scored CVEs.
What is the CVSS score of CVE-2026-59183?
CVE-2026-59183 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-59183?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59183, 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-2026-59183
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