CVE-2026-54920

UNRATEDCVSS · not yet scoredElevated
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EchelonGraph verdictPlan a fixWithin your standard update timelines — no confirmed exploitation yet.
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS v2: —Exploit: 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 3.4.0 through 3.4.12, a reachable assertion failure in the HTJ2K decode path allows a crafted HTJ2K-compressed EXR file to cause an unconditional process abort in any application that calls exr_start_read() on untrusted input, resulting in denial of service. The crash is triggered by a QCD marker whose lower five bits are zero, which OpenEXR passes into the vendored OpenJPH library while constructing the codestream and evaluating its quantization delta parameters. OpenJPH uses an assertion rather than a recoverable error to validate those bits, so any invalid value calls abort() directly and cannot be intercepted by surrounding error handling, a problem compounded by OpenEXR wrapping only its internal HT header parser in error handling while leaving the later codestream read and construction calls unprotected. This issue has been resolved in version 3.4.13.

CVSS v3
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0.4%
EPSS %ILE
27th
KEV
Not listed

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (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

References (1)

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
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Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 29× 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. 2026-10-11 19:39 UTCEG score recompute
  2. 2026-10-11 16:54 UTCEG score recompute
  3. 2026-10-11 14:17 UTCEG score recompute
  4. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  7. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  9. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  12. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  13. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  14. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  15. 2026-10-01 01:29 UTCEG score recompute
  16. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  17. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  18. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  19. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  20. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  21. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  22. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  23. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  24. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  25. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
Show 24 more
  1. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  3. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  4. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  5. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  6. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  7. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  8. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  9. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  10. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  11. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  12. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  13. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  17. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-08-25 16:22 UTCNVD update
  19. 2026-08-25 15:30 UTCEG score recompute
  20. 2026-08-25 15:29 UTCMITRE cvelistV5
  21. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  22. 2026-08-25 01:17 UTCNVD update
  23. 2026-08-25 00:25 UTCEG score recompute
  24. 2026-08-25 00:25 UTCMITRE cvelistV5first tracked

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Frequently asked(4)

What is CVE-2026-54920?
CVE-2026-54920 is a vulnerability whose severity is not yet rated; 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 3.4.0 through 3.4.12, a reachable assertion failure in the HTJ2K decode path allows a crafted HTJ2K-compressed EXR file to cause an unconditional process abort…
When was the CVE record for CVE-2026-54920 published?
The CVE record for CVE-2026-54920 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-2026-54920 actively exploited?
CVE-2026-54920 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (27th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-54920?
A fix for CVE-2026-54920 is available: update to the fixed version the vendor names in its advisory.

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