CVE-2026-62289

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (32nd percentile of EPSS-scored CVEs). 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
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.0 and earlier, a crafted HEIF or AVIF file containing a clean aperture box can reduce an image dimension to zero and crash or corrupt tiling results when heif_image_handle_get_image_tiling(handle, 1, &tiling) is called. ImageItem::get_heif_image_tiling() returns already transformed dimensions, and process_image_transformations_on_tiling() applies the clean aperture transformation again. The second application passes zero to Box_clap::left_rounded(0), where image_width minus one underflows and constructs Fraction(0xFFFFFFFF, 2). Debug builds reach an assertion and abort, while release builds can return a corrupt crop and zero-width tiling result. The affected implementation spans libheif/image-items/image_item.cc, libheif/context.cc, and libheif/box.cc. This issue is fixed in version 1.23.1.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
20
EG Risk 20/100CISA SSVC

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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
32nd
KEV
Not listed

CISA SSVCTrack at every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 18, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Aug 18, 2026
Patch available. Sources: github_commit, github_release, github.
githubMentions a patch (unverified)

Integer underflow in Fraction constructor via double clap transform application (CWE-190/617) · Advisory · strukturag/libheif · GitHub

Affected: v1.23.0 (latest). Verified against 10+ related Fraction/clap commits including

https://github.com/strukturag/libheif/security/advisories/GHSA-jc8f-p23p-5hjg
github_release Patch Available

v1.23.1

Patch available: strukturag/libheif v1.23.1

https://github.com/strukturag/libheif/releases/tag/v1.23.1
github_commit Patch Available

commit f01870c1d732 (strukturag/libheif)

Patch available: strukturag/libheif v1.23.1 (contains commit f01870c1d732)

https://github.com/strukturag/libheif/commit/f01870c1d7323a3003796d58eba7fff502be994c

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibheif1 (1.21.2-3ubuntu0.4) @ resolute2026-10-07ubuntu
ubuntulibheif1 (1.17.6-1ubuntu4.8) @ noble2026-10-07ubuntu

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libheif1.15.1-1 ... 1.23.4-1~deb13u1 (37 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libheif1.19.8-1
  • every version up to 1.19.8-1+deb13u1: fixed in 1.19.8-1+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libheif1.19.8-1 ... 1.21.2-4 (8 versions)
  • every version up to 1.23.1-1: fixed in 1.23.1-1
—

Weakness Classification(2)

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

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 16× in last 7d / 70× 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 131 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

Same vendor

2 shown

ubuntu:USN-8649-1 · ubuntu:USN-8683-1

Frequently asked(5)

What is CVE-2026-62289?
CVE-2026-62289 is a medium vulnerability published on August 18, 2026. libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.0 and earlier, a crafted HEIF or AVIF file containing a clean aperture box can reduce an image dimension to zero and crash or corrupt tiling results when heifimagehandlegetimagetiling(handle, 1, &tiling) is called.…
When was CVE-2026-62289 disclosed?
CVE-2026-62289 was first published on August 18, 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-2026-62289 actively exploited?
CVE-2026-62289 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-62289?
CVE-2026-62289 has a CVSS base score of 4.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-62289?
A fix for CVE-2026-62289 is available: update to the fixed version the vendor names in its advisory.

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