CVE-2026-65979

MEDIUMPre-NVD 6.76.7
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 6.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (7th 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

Also known asEUVD-2026-65734 (ENISA EUVD)Source: ENISA EUVD

6.7EG
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: 0.2%CVSS: 6.7Exploit: 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. From version 3.4.0 through 3.4.12, the HTJ2K decoder parses a header-length field (PLEN) from a chunk's compressed data but never checks that this value fits within the available buffer before using it. When decoding, it advances the codestream pointer by the attacker-supplied header size and passes the resulting offset and remaining length to the OpenJPH memory-input path, so a crafted value pushes the pointer past the end of the buffer and causes an out-of-bounds read. Because this field comes straight from attacker-controlled EXR chunk data, the flaw is reachable during normal decoding of an untrusted file. This issue is fixed in version 3.4.13.

CVSS
6.7
EG Score
6.7MEDIUMmedium confidence
EG Risk
46
EG Risk 46/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity67% × 45%
Impact severity (EG Severity): CVSS 6.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
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
0.2%
EPSS %ILE
7th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.7): severity, escalated by confirmed exploitation. This CVE's 6.7 is its impact severity (EG Severity), not escalated.

EG Severity
6.7 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

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.

The score's inputs: 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 (3)

Auto-updated Aug 25, 2026
Patch available. Sources: github_commit, github_release, github.
GitHub advisoryMentions a patch (unverified)

Out-of-bounds read in OpenEXR HTJ2K decoder from unvalidated chunk header length (PLEN) · Advisory · AcademySoftwareFoundation/openexr · GitHub

https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-3j9c-j7c9-x293
GitHub release Patch Available

v3.4.13

Patch available: AcademySoftwareFoundation/openexr v3.4.13

https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.13
GitHub commit Patch Available

commit c7af2d233b7b (AcademySoftwareFoundation/openexr)

Patch available: AcademySoftwareFoundation/openexr v3.4.13 (contains commit c7af2d233b7b)

https://github.com/AcademySoftwareFoundation/openexr/commit/c7af2d233b7b2a4452c11f26cf47584cc2b35721

Affected Packages

(1 across 1 ecosystem)
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(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 28× 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 its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS → 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 109 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 9 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  4. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  5. 2026-11-08 16:40 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  6. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  7. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  8. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  9. 2026-11-04 16:36 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  10. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  11. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  12. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  14. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-10-30 07:55 UTCOSV refresh
  16. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  17. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  18. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  19. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  20. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  21. 2026-10-25 14:11 UTCEchelonGraph re-scored
  22. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  23. 2026-10-22 19:37 UTCEchelonGraph re-scored
  24. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  25. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
Show 75 more
  1. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-10-18 03:21 UTCEchelonGraph re-scored
  4. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  5. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  6. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  7. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  8. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  9. 2026-10-12 15:46 UTCEchelonGraph re-scored
  10. 2026-10-11 19:31 UTCEchelonGraph re-scored
  11. 2026-10-11 16:46 UTCEchelonGraph re-scored
  12. 2026-10-11 14:07 UTCEchelonGraph re-scored
  13. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  14. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-10-10 11:43 UTCEchelonGraph re-scored
  16. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  17. 2026-10-09 04:09 UTCEchelonGraph re-scored
  18. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  19. 2026-10-08 02:52 UTCEchelonGraph re-scored
  20. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  21. 2026-10-06 21:58 UTCEchelonGraph re-scored
  22. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  23. 2026-10-05 20:53 UTCEchelonGraph re-scored
  24. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  25. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  26. 2026-10-03 16:21 UTCEchelonGraph re-scored
  27. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  28. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  29. 2026-10-01 07:46 UTCEchelonGraph re-scored
  30. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  31. 2026-09-30 06:41 UTCEchelonGraph re-scored
  32. 2026-09-29 00:09 UTCEchelonGraph re-scored
  33. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  34. 2026-09-27 23:04 UTCEchelonGraph re-scored
  35. 2026-09-26 21:59 UTCEchelonGraph re-scored
  36. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  37. 2026-09-25 14:40 UTCEchelonGraph re-scored
  38. 2026-09-24 13:01 UTCEchelonGraph re-scored
  39. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  40. 2026-09-23 11:55 UTCEchelonGraph re-scored
  41. 2026-09-22 10:50 UTCEchelonGraph re-scored
  42. 2026-09-21 09:45 UTCEchelonGraph re-scored
  43. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  44. 2026-09-20 08:40 UTCEchelonGraph re-scored
  45. 2026-09-19 07:01 UTCEchelonGraph re-scored
  46. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  47. 2026-09-18 05:56 UTCEchelonGraph re-scored
  48. 2026-09-17 04:49 UTCEchelonGraph re-scored
  49. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  50. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  51. 2026-09-16 03:44 UTCEchelonGraph re-scored
  52. 2026-09-14 01:33 UTCEchelonGraph re-scored
  53. 2026-09-13 00:28 UTCEchelonGraph re-scored
  54. 2026-09-11 23:23 UTCEchelonGraph re-scored
  55. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  56. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  57. 2026-09-10 22:18 UTCEchelonGraph re-scored
  58. 2026-09-09 13:56 UTCEchelonGraph re-scored
  59. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  60. 2026-09-08 12:18 UTCEchelonGraph re-scored
  61. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  62. 2026-09-07 10:24 UTCEchelonGraph re-scored
  63. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  64. 2026-09-06 09:18 UTCEchelonGraph re-scored
  65. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  66. 2026-09-05 08:13 UTCEchelonGraph re-scored
  67. 2026-09-04 07:08 UTCEchelonGraph re-scored
  68. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  69. 2026-09-03 05:58 UTCEchelonGraph re-scored
  70. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  71. 2026-09-02 04:54 UTCEchelonGraph re-scored
  72. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  73. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  74. 2026-08-31 02:26 UTCEchelonGraph re-scored
  75. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 3rd percentile

Frequently asked(5)

What is CVE-2026-65979?
CVE-2026-65979 is a medium-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. From version 3.4.0 through 3.4.12, the HTJ2K decoder parses a header-length field (PLEN) from a chunk's compressed data but never checks that this value fits within the…
When was the CVE record for CVE-2026-65979 published?
The CVE record for CVE-2026-65979 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-2026-65979 actively exploited?
CVE-2026-65979 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-65979?
CVE-2026-65979 has a CVSS base score of 6.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-65979?
A fix for CVE-2026-65979 is available: update to the fixed version the vendor names in its advisory.

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