CVE-2026-47709

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.5 under NVD CVSS v3. 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 NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Elevated
5.5EG
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: 5.5Exploit: No code on recordExposed services: Not assessed

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
5.5MEDIUMmedium confidence
EG Risk
41
EG Risk 41/100

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 (value × EchelonGraph’s weight)
Severity55% × 45%
The EG Score, 5.5 of 10.
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

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.

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

July 21, 2026

Last Modified

July 27, 2026

Advisory Details (3)

Auto-updated Jul 22, 2026
Patch available. Sources: github_pr, github.
GitHub advisoryMentions a patch (unverified)

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 pull request 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
Web page

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 / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibheif1 (1.21.2-3ubuntu0.3) @ resolute2026-10-04ubuntu
ubuntulibheif1 (1.17.6-1ubuntu4.6) @ noble2026-10-04ubuntu

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 rangeFix by version rangeDependents
libheif1.11.0-1 ... 1.23.1-1 (39 versions)
  • every version on: no fix on record
—
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(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 11× in last 7d / 43× 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.

Showing the most recent 100 of 170 refreshes 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 70 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

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

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

Frequently asked(5)

What is CVE-2026-47709?
CVE-2026-47709 is a medium-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-47709 published?
The CVE record for CVE-2026-47709 was published on July 21, 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 July 27, 2026; the record at its source may have been updated since.
Is CVE-2026-47709 actively exploited?
CVE-2026-47709 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-2026-47709?
CVE-2026-47709 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-47709?
A fix for CVE-2026-47709 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-47709

Explore →

Is Your Infrastructure Affected by CVE-2026-47709?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs