CVE-2026-47709

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 89% 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
Trending — 3 sources updated this weekElevated
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: Elevated riskExposed: 0

A fix is available — apply it.

libheif is a HEIF and AVIF file format decoder and encoder. Versions prior to 1.22.0 crashes in the public C API heif_image_handle_get_image_tiling() when a malformed uncompressed HEIF image item has an associated uncC property but no associated ispe property. In debug builds this trips the ispe && uncC assertion in ImageItem_uncompressed::get_heif_image_tiling(). In a release/NDEBUG ASan build, the same file causes a null pointer read at address 0xa8. Version 1.22.0 fixes the issue.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity55% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
11%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 27, 2026

Advisory Details (3)

Auto-updated Jul 22, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github.
github Patch Available🟡 PoC Available

NULL pointer dereference in heif_image_handle_get_image_tiling for malformed unci image missing ispe · Advisory · strukturag/libheif · GitHub

https://github.com/strukturag/libheif/security/advisories/GHSA-4h72-vqgp-9376
github_pr Patch Available

heif_entity_groups: fix NULL deref on unknown grpl child types

Patch available: strukturag/libheif v1.22.0 (PR #1806 merged 2026-05-18)

https://github.com/strukturag/libheif/pull/1806
generic

NULL pointer dereference in heif_context_get_entity_groups on unknown grpl child types · Issue #1802 · strukturag/libheif · GitHub

https://github.com/strukturag/libheif/issues/1802

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibheif1 (1.17.6-1ubuntu4.6) @ noble2026-08-30ubuntu
ubuntulibheif1 (1.21.2-3ubuntu0.3) @ resolute2026-08-30ubuntu

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
libheif1.11.0-1 ... 1.23.1-1 (39 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libheif1.15.1-1 ... 1.23.1-1 (33 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 ... 1.23.1-1 (9 versions)——

Weakness Classification(1)

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 17× in last 7d / 78× 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. 2026-08-30 02:09 UTCEG score recompute
  2. 2026-08-30 02:09 UTCVendor advisory
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-28 21:41 UTCEPSS rescore
  5. 2026-08-27 22:23 UTCEG score recompute
  6. 2026-08-27 22:23 UTCVendor advisory
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-26 21:27 UTCEG score recompute
  9. 2026-08-26 21:27 UTCVendor advisory
  10. 2026-08-26 14:46 UTCEPSS rescore
  11. 2026-08-25 19:57 UTCEG score recompute
  12. 2026-08-25 19:57 UTCVendor advisory
  13. 2026-08-25 13:49 UTCEPSS rescore
  14. 2026-08-24 18:47 UTCEG score recompute
  15. 2026-08-24 18:47 UTCVendor advisory
  16. 2026-08-23 17:35 UTCEG score recompute
  17. 2026-08-23 17:35 UTCVendor advisory
  18. 2026-08-23 00:19 UTCEPSS rescore
  19. 2026-08-22 16:39 UTCEG score recompute
  20. 2026-08-22 16:39 UTCVendor advisory
  21. 2026-08-21 23:49 UTCEPSS rescore
  22. 2026-08-21 15:30 UTCEG score recompute
  23. 2026-08-21 15:30 UTCVendor advisory
  24. 2026-08-20 22:55 UTCEPSS rescore
  25. 2026-08-20 14:34 UTCEG score recompute
Show 74 more
  1. 2026-08-20 14:34 UTCVendor advisory
  2. 2026-08-19 17:04 UTCEPSS rescore
  3. 2026-08-19 12:51 UTCEG score recompute
  4. 2026-08-19 12:51 UTCVendor advisory
  5. 2026-08-18 13:48 UTCEPSS rescore
  6. 2026-08-18 11:55 UTCEG score recompute
  7. 2026-08-18 11:55 UTCVendor advisory
  8. 2026-08-17 13:47 UTCEPSS rescore
  9. 2026-08-17 10:58 UTCEG score recompute
  10. 2026-08-17 10:58 UTCVendor advisory
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 10:02 UTCEG score recompute
  13. 2026-08-16 10:02 UTCVendor advisory
  14. 2026-08-16 02:14 UTCEPSS rescore
  15. 2026-08-15 09:07 UTCEG score recompute
  16. 2026-08-15 09:07 UTCVendor advisory
  17. 2026-08-15 01:30 UTCEPSS rescore
  18. 2026-08-14 08:11 UTCEG score recompute
  19. 2026-08-14 08:11 UTCVendor advisory
  20. 2026-08-13 22:00 UTCEPSS rescore
  21. 2026-08-13 07:15 UTCEG score recompute
  22. 2026-08-13 07:15 UTCVendor advisory
  23. 2026-08-12 13:51 UTCEPSS rescore
  24. 2026-08-12 06:11 UTCEG score recompute
  25. 2026-08-11 05:13 UTCEG score recompute
  26. 2026-08-11 05:13 UTCVendor advisory
  27. 2026-08-11 00:00 UTCEPSS rescore
  28. 2026-08-10 04:17 UTCEG score recompute
  29. 2026-08-10 04:17 UTCVendor advisory
  30. 2026-08-09 13:46 UTCEPSS rescore
  31. 2026-08-09 03:21 UTCEG score recompute
  32. 2026-08-09 03:21 UTCVendor advisory
  33. 2026-08-08 16:37 UTCEPSS rescore
  34. 2026-08-08 02:25 UTCEG score recompute
  35. 2026-08-08 02:25 UTCVendor advisory
  36. 2026-08-07 01:29 UTCEG score recompute
  37. 2026-08-07 01:29 UTCVendor advisory
  38. 2026-08-06 13:47 UTCEPSS rescore
  39. 2026-08-06 00:33 UTCEG score recompute
  40. 2026-08-06 00:33 UTCVendor advisory
  41. 2026-08-05 19:17 UTCEPSS rescore
  42. 2026-08-04 23:37 UTCEG score recompute
  43. 2026-08-04 23:37 UTCVendor advisory
  44. 2026-08-04 15:10 UTCEPSS rescore
  45. 2026-08-04 10:39 UTCEPSS rescore
  46. 2026-08-03 22:41 UTCEG score recompute
  47. 2026-08-03 22:41 UTCVendor advisory
  48. 2026-08-03 10:36 UTCEPSS rescore
  49. 2026-08-02 21:45 UTCEG score recompute
  50. 2026-08-02 21:45 UTCVendor advisory
  51. 2026-08-02 02:27 UTCEPSS rescore
  52. 2026-08-01 20:49 UTCEG score recompute
  53. 2026-08-01 04:16 UTCEPSS rescore
  54. 2026-07-30 18:55 UTCEG score recompute
  55. 2026-07-30 18:55 UTCVendor advisory
  56. 2026-07-30 16:28 UTCEPSS rescore
  57. 2026-07-30 01:30 UTCEPSS rescore
  58. 2026-07-28 17:02 UTCEG score recompute
  59. 2026-07-28 15:37 UTCEPSS rescore
  60. 2026-07-27 15:23 UTCEG score recompute▼ 1.40
  61. 2026-07-27 15:21 UTCNVD updateCVSS v3 → 5.5
  62. 2026-07-27 10:53 UTCEG score recompute
  63. 2026-07-26 14:54 UTCEPSS rescore
  64. 2026-07-26 09:57 UTCEG score recompute
  65. 2026-07-26 09:57 UTCVendor advisory
  66. 2026-07-25 14:18 UTCEPSS rescore
  67. 2026-07-24 14:18 UTCEPSS rescore
  68. 2026-07-23 14:18 UTCEPSS rescore
  69. 2026-07-23 03:17 UTCEG score recompute
  70. 2026-07-22 22:55 UTCEG score recompute
  71. 2026-07-22 22:55 UTCVendor advisory
  72. 2026-07-22 14:08 UTCEPSS rescore
  73. 2026-07-21 23:09 UTCEG score recompute
  74. 2026-07-21 21:38 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-47709?
CVE-2026-47709 is a medium vulnerability published on July 21, 2026. libheif is a HEIF and AVIF file format decoder and encoder. Versions prior to 1.22.0 crashes in the public C API heifimagehandlegetimagetiling() when a malformed uncompressed HEIF image item has an associated uncC property but no associated ispe property. In debug builds this trips the ispe && uncC…
When was CVE-2026-47709 disclosed?
CVE-2026-47709 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on July 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-47709 actively exploited?
CVE-2026-47709 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 88.6% of all scored CVEs.
What is the CVSS score of CVE-2026-47709?
CVE-2026-47709 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-47709?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47709, 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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