CVE-2026-59186

HIGHPre-NVD 7.17.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (34th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated
7.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.1Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, a crafted tiled EXR can trigger a heap out-of-bounds write on 32-bit/ILP32 builds when read through the public TiledRgbaInputFile RGBA API. The file uses a small 40x40 dataWindow but a 65537x65537 tile size. On ILP32, the Array2D tile-conversion buffer size calculation overflows, allocates a much smaller heap buffer, and tile decode writes past that allocation. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.

CVSS v3
7.1
EG Score
7.1HIGHmedium confidence
EG Risk
48
EG Risk 48/100

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 (value × EchelonGraph’s weight)
Severity71% × 45%
The EG Score, 7.1 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
34th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 25, 2026

Last Modified

September 9, 2026

Advisory Details (4)

Auto-updated Aug 25, 2026
Patch available. Sources: github, github_commit.
GitHub commit Patch Available

commit b1a588737277 (AcademySoftwareFoundation/openexr)

Patch available: AcademySoftwareFoundation/openexr v3.3.13 (contains commit b1a588737277)

https://github.com/AcademySoftwareFoundation/openexr/commit/b1a5887372772d79328f4eb42b7f86352a38170b
GitHub commit Patch Available

commit 904141d3a1f8 (AcademySoftwareFoundation/openexr)

Patch available: AcademySoftwareFoundation/openexr v3.2.11 (contains commit 904141d3a1f8)

https://github.com/AcademySoftwareFoundation/openexr/commit/904141d3a1f86327ad1e2b93fc92ce2dd5881d34
GitHub commit Patch Available

commit 71907b44ce9a (AcademySoftwareFoundation/openexr)

Patch available: AcademySoftwareFoundation/openexr v3.4.14 (contains commit 71907b44ce9a)

https://github.com/AcademySoftwareFoundation/openexr/commit/71907b44ce9a1b05bf3934b8a7821752750731ab
GitHub advisoryMentions a patch (unverified)

OpenEXR ILP32 TiledRgbaInputFile large tile Array2D heap OOB write · Advisory · AcademySoftwareFoundation/openexr · GitHub

https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-f667-c4wm-c8gq

Vendor Advisories for CVE-2026-59186(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
openexr3.1.13-1 ... 3.4.6+ds-4 (11 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
openexr3.1.13-2 ... 3.4.6+ds-4 (7 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
openexr3.1.13-2, 3.4.6+ds-1, 3.4.6+ds-2, 3.4.6+ds-3, 3.4.6+ds-4
  • every version up to 3.4.14-0.1: fixed in 3.4.14-0.1
—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 55× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  2. 2026-10-13 16:18 UTCEG score recompute
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  4. 2026-10-12 15:52 UTCEG score recompute
  5. 2026-10-11 19:36 UTCEG score recompute
  6. 2026-10-11 16:51 UTCEG score recompute
  7. 2026-10-11 14:14 UTCEG score recompute
  8. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  10. 2026-10-10 11:57 UTCEG score recompute
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  12. 2026-10-09 04:21 UTCEG score recompute
  13. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  14. 2026-10-08 03:14 UTCEG score recompute
  15. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  16. 2026-10-06 21:23 UTCEG score recompute
  17. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  18. 2026-10-05 20:36 UTCEG score recompute
  19. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  20. 2026-10-05 08:13 UTCEG score recompute
  21. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  22. 2026-10-03 16:26 UTCEG score recompute
  23. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  24. 2026-10-02 21:48 UTCEG score recompute
  25. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
Show 66 more
  1. 2026-10-01 21:02 UTCEG score recompute
  2. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  3. 2026-09-30 20:14 UTCEG score recompute
  4. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  5. 2026-09-30 06:45 UTCEG score recompute
  6. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  7. 2026-09-29 00:13 UTCEG score recompute
  8. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  9. 2026-09-27 23:21 UTCEG score recompute
  10. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  11. 2026-09-26 22:02 UTCEG score recompute
  12. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  13. 2026-09-24 22:15 UTCEG score recompute
  14. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  15. 2026-09-23 20:32 UTCEG score recompute
  16. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  17. 2026-09-22 19:46 UTCEG score recompute
  18. 2026-09-22 07:23 UTCEG score recompute
  19. 2026-09-21 06:35 UTCEG score recompute
  20. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  21. 2026-09-19 17:18 UTCEG score recompute
  22. 2026-09-19 04:54 UTCEG score recompute
  23. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  24. 2026-09-18 04:08 UTCEG score recompute
  25. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  26. 2026-09-16 14:56 UTCEG score recompute
  27. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  28. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  29. 2026-09-15 14:10 UTCEG score recompute
  30. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  31. 2026-09-14 01:00 UTCEG score recompute
  32. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  33. 2026-09-13 00:10 UTCEG score recompute
  34. 2026-09-11 10:58 UTCEG score recompute
  35. 2026-09-10 09:37 UTCEG score recompute
  36. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  37. 2026-09-09 01:13 UTCEG score recompute
  38. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  39. 2026-09-07 20:28 UTCEG score recompute
  40. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  41. 2026-09-06 19:16 UTCEG score recompute
  42. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  43. 2026-09-05 18:29 UTCEG score recompute
  44. 2026-09-04 17:42 UTCEG score recompute
  45. 2026-09-04 05:17 UTCEG score recompute
  46. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  47. 2026-09-02 16:02 UTCEG score recompute
  48. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  49. 2026-09-01 15:08 UTCEG score recompute
  50. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  51. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  52. 2026-08-31 01:50 UTCEG score recompute
  53. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  54. 2026-08-30 13:27 UTCEG score recompute
  55. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  56. 2026-08-29 00:15 UTCEG score recompute
  57. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  58. 2026-08-27 21:00 UTCEG score recompute
  59. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  60. 2026-08-26 20:11 UTCEG score recompute
  61. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  62. 2026-08-25 19:20 UTCEG score recompute
  63. 2026-08-25 18:30 UTCEG score recompute
  64. 2026-08-25 17:24 UTCEG score recompute
  65. 2026-08-25 16:40 UTCEG score recomputeFirst assessed: 7.1 HIGH
  66. 2026-08-25 16:40 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-59186?
CVE-2026-59186 is a high-severity vulnerability; its CVE record was 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 before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, a crafted tiled EXR can trigger a heap out-of-bounds write on 32-bit/ILP32 builds when read…
When was the CVE record for CVE-2026-59186 published?
The CVE record for CVE-2026-59186 was published on August 25, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 9, 2026; the record at its source may have been updated since.
Is CVE-2026-59186 actively exploited?
CVE-2026-59186 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (34th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-59186?
CVE-2026-59186 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-59186?
A fix for CVE-2026-59186 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-59186 are linked in the Vendor Advisories panel on this page.

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