CVE-2026-42216

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 61% 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
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: Elevated riskExposed: 0

A fix is available — apply it.

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From versions 3.0.0 to before 3.2.9, 3.3.0 to before 3.3.11, and 3.4.0 to before 3.4.11, IDManifest::init() reconstructs strings from a prefix-compressed representation. If the previous string is longer than 255 bytes, the next string is expected to begin with a 2-byte prefix length. The code reads stringList[i][0] and stringList[i][1] without checking that the current string has at least two bytes. This issue has been patched in versions 3.2.9, 3.3.11, and 3.4.11.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
72(Attend)
EG Risk 72/100SSVC: Attend

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
Severity91% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

May 7, 2026

Last Modified

September 9, 2026

Advisory Details (9)

Auto-updated Sep 15, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Out-of-bounds read in `IDManifest::init()` during prefix expansion · Advisory · AcademySoftwareFoundation/openexr · GitHub

https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-65j8-95g9-jgj4
redhat Patch Available

2467633 – (CVE-2026-42216) CVE-2026-42216 OpenEXR: OpenEXR: Information disclosure and denial of service via malformed EXR files

Affected: Red Hat Enterprise Linux 10

https://bugzilla.redhat.com/show_bug.cgi?id=2467633
redhat Patch Available

CVE-2026-42216 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-42216
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2026:39027
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2026:39026
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.6 Extended Update Support.

https://access.redhat.com/errata/RHSA-2026:39025
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.0 Extended Update Support.

https://access.redhat.com/errata/RHSA-2026:39024
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2026:38499
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:38498

Vendor Advisories for CVE-2026-42216(5)

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

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatopenexr-0:3.1.1-3.el9_8.32026-07-13redhat
redhatopenexr-0:3.1.1-2.el9_2.42026-07-13redhat
redhatopenexr-0:3.1.1-2.el9_4.42026-07-13redhat
redhatopenexr-0:3.1.1-3.el9_6.32026-07-13redhat
redhatopenexr-0:3.1.10-8.el10_2.32026-07-13redhat
redhatopenexr-0:3.1.10-8.el10_0.32026-07-13redhat

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
openexr2.5.4-2 ... 3.4.6+ds-4 (19 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
openexr3.1.13-1 ... 3.4.6+ds-4 (10 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
openexr3.1.13-2 ... 3.4.6+ds-4 (6 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
openexr3.1.13-2, 3.4.6+ds-1, 3.4.6+ds-2, 3.4.6+ds-3, 3.4.6+ds-43.4.14-0.1—

Weakness Classification(2)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 28× 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 218 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-42216?
CVE-2026-42216 is a critical vulnerability published on May 7, 2026. OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From versions 3.0.0 to before 3.2.9, 3.3.0 to before 3.3.11, and 3.4.0 to before 3.4.11, IDManifest::init() reconstructs strings from a prefix-compressed…
When was CVE-2026-42216 disclosed?
CVE-2026-42216 was first published in the National Vulnerability Database on May 7, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42216 actively exploited?
CVE-2026-42216 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 60.6% of all scored CVEs.
What is the CVSS score of CVE-2026-42216?
CVE-2026-42216 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-42216?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42216, 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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