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: 0.3%, top 77% 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, 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%CVSS: 4.3Exploit: None knownExposed: 0

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
4.3(medium)
EG Risk
19(Track)
EG Risk 19/100SSVC: Track

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%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

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.
github Patch Available

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 / EcosystemFixed in / PatchReleasedSource
ubuntulibheif1 (1.1.0-2ubuntu0.1~esm4) @ bionic2026-09-19ubuntu
ubuntulibheif1 (1.21.2-3ubuntu0.4) @ resolute2026-09-19ubuntu

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 rangeFixed inDependents
libheif1.15.1-1 ... 1.23.2-1 (34 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libheif1.19.8-11.19.8-1+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libheif1.19.8-1 ... 1.21.2-4 (8 versions)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 15× in last 7d / 73× 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.

  1. 2026-09-19 10:46 UTCEG score recompute
  2. 2026-09-19 10:46 UTCVendor advisory
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 11:54 UTCEG score recompute
  5. 2026-09-18 11:54 UTCVendor advisory
  6. 2026-09-17 13:17 UTCVendor advisory
  7. 2026-09-16 14:41 UTCEG score recompute
  8. 2026-09-16 14:41 UTCVendor advisory
  9. 2026-09-16 14:08 UTCEPSS rescore
  10. 2026-09-16 05:15 UTCEPSS rescore
  11. 2026-09-15 14:41 UTCEG score recompute
  12. 2026-09-15 14:41 UTCVendor advisory
  13. 2026-09-14 16:04 UTCVendor advisory
  14. 2026-09-13 17:28 UTCEG score recompute
  15. 2026-09-13 17:28 UTCVendor advisory
  16. 2026-09-12 18:52 UTCEG score recompute
  17. 2026-09-12 18:52 UTCVendor advisory
  18. 2026-09-11 20:16 UTCEG score recompute
  19. 2026-09-11 20:16 UTCVendor advisory
  20. 2026-09-11 14:53 UTCEPSS rescore
  21. 2026-09-11 09:37 UTCEPSS rescore
  22. 2026-09-10 21:14 UTCEG score recompute
  23. 2026-09-10 21:14 UTCVendor advisory
  24. 2026-09-09 22:38 UTCVendor advisory
  25. 2026-09-09 02:46 UTCEG score recompute
Show 57 more
  1. 2026-09-09 02:46 UTCVendor advisory
  2. 2026-09-08 22:01 UTCEPSS rescore
  3. 2026-09-07 16:01 UTCEPSS rescore
  4. 2026-09-07 15:47 UTCVendor advisory
  5. 2026-09-06 16:20 UTCEG score recompute
  6. 2026-09-06 16:20 UTCVendor advisory
  7. 2026-09-06 13:47 UTCEPSS rescore
  8. 2026-09-05 17:43 UTCEG score recompute
  9. 2026-09-04 19:01 UTCEG score recompute
  10. 2026-09-04 19:01 UTCVendor advisory
  11. 2026-09-04 05:07 UTCEPSS rescore
  12. 2026-09-02 21:43 UTCEG score recompute
  13. 2026-09-02 21:43 UTCVendor advisory
  14. 2026-09-02 14:12 UTCEPSS rescore
  15. 2026-09-01 22:59 UTCEG score recompute
  16. 2026-09-01 22:59 UTCVendor advisory
  17. 2026-09-01 13:54 UTCEPSS rescore
  18. 2026-09-01 04:40 UTCEPSS rescore
  19. 2026-09-01 00:23 UTCVendor advisory
  20. 2026-08-31 01:46 UTCEG score recompute
  21. 2026-08-31 01:46 UTCVendor advisory
  22. 2026-08-30 19:17 UTCEPSS rescore
  23. 2026-08-30 03:10 UTCEG score recompute
  24. 2026-08-30 03:10 UTCVendor advisory
  25. 2026-08-30 01:22 UTCEPSS rescore
  26. 2026-08-29 04:34 UTCEG score recompute
  27. 2026-08-28 21:42 UTCEPSS rescore
  28. 2026-08-28 05:36 UTCEG score recompute
  29. 2026-08-27 14:25 UTCEPSS rescore
  30. 2026-08-27 06:46 UTCEG score recompute
  31. 2026-08-27 06:46 UTCVendor advisory
  32. 2026-08-26 14:46 UTCEPSS rescore
  33. 2026-08-26 07:43 UTCEG score recompute
  34. 2026-08-26 07:43 UTCVendor advisory
  35. 2026-08-25 13:49 UTCEPSS rescore
  36. 2026-08-25 09:02 UTCEG score recompute
  37. 2026-08-25 09:02 UTCVendor advisory
  38. 2026-08-24 10:26 UTCEG score recompute
  39. 2026-08-24 10:26 UTCVendor advisory
  40. 2026-08-23 11:50 UTCEG score recompute
  41. 2026-08-23 11:50 UTCVendor advisory
  42. 2026-08-23 00:19 UTCEPSS rescore
  43. 2026-08-22 13:15 UTCEG score recompute
  44. 2026-08-22 13:15 UTCVendor advisory
  45. 2026-08-21 23:49 UTCEPSS rescore
  46. 2026-08-21 14:39 UTCEG score recompute
  47. 2026-08-21 14:39 UTCVendor advisory
  48. 2026-08-20 22:55 UTCEPSS rescore
  49. 2026-08-20 16:03 UTCVendor advisory
  50. 2026-08-19 17:24 UTCEG score recompute
  51. 2026-08-19 17:24 UTCVendor advisory
  52. 2026-08-19 17:07 UTCEG score recompute
  53. 2026-08-19 17:07 UTCVendor advisory
  54. 2026-08-19 17:04 UTCEPSS rescore
  55. 2026-08-18 22:23 UTCEG score recompute
  56. 2026-08-18 21:23 UTCEG score recompute
  57. 2026-08-18 21:23 UTCMITRE cvelistV5first tracked

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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 76.9% of all scored CVEs.
What is the CVSS score of CVE-2026-62289?
CVE-2026-62289 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-62289?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62289, 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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