CVE-2026-47254

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 91% 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
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: None knownExposed: 0

A fix is available — apply it.

libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, Track::init_sample_timing_table() in libheif/sequences/track.cc stores an out-of-bounds chunk index (m_chunks.size()) into m_presentation_timeline when the number of chunks defined in the stco box is less than the number of samples in stsz. A subsequent call to heif_track_get_next_raw_sequence_sample() reads m_chunks[chunk_idx] with that OOB index, causing a heap-buffer-overflow. Version 1.22.0 fixes the issue.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity61% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 27, 2026

Advisory Details (1)

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

Heap Buffer Overflow in `Track::get_next_sample_raw_data()` -- OOB Chunk Vector Access · Advisory · strukturag/libheif · GitHub

https://github.com/strukturag/libheif/security/advisories/GHSA-wqjg-4x9g-6cvg

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
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

(3 across 3 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: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

(1)

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 / 77× 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 21:16 UTCEG score recompute
  6. 2026-08-27 21:16 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 18:43 UTCEG score recompute
  12. 2026-08-25 18:43 UTCVendor advisory
  13. 2026-08-25 13:49 UTCEPSS rescore
  14. 2026-08-24 20:53 UTCEG score recompute
  15. 2026-08-24 20:53 UTCVendor advisory
  16. 2026-08-23 23:02 UTCVendor advisory
  17. 2026-08-23 00:53 UTCVendor advisory
  18. 2026-08-22 03:02 UTCEG score recompute
  19. 2026-08-22 03:02 UTCVendor advisory
  20. 2026-08-21 23:49 UTCEPSS rescore
  21. 2026-08-21 05:11 UTCEG score recompute
  22. 2026-08-21 05:11 UTCVendor advisory
  23. 2026-08-20 22:55 UTCEPSS rescore
  24. 2026-08-20 07:20 UTCEG score recompute
  25. 2026-08-20 07:20 UTCVendor advisory
Show 72 more
  1. 2026-08-19 17:04 UTCEPSS rescore
  2. 2026-08-19 09:29 UTCVendor advisory
  3. 2026-08-18 11:39 UTCVendor advisory
  4. 2026-08-17 13:48 UTCEG score recompute
  5. 2026-08-17 13:48 UTCVendor advisory
  6. 2026-08-17 13:47 UTCEPSS rescore
  7. 2026-08-16 15:58 UTCEG score recompute
  8. 2026-08-16 15:58 UTCVendor advisory
  9. 2026-08-16 14:56 UTCEPSS rescore
  10. 2026-08-16 02:14 UTCEPSS rescore
  11. 2026-08-15 18:08 UTCEG score recompute
  12. 2026-08-15 18:08 UTCVendor advisory
  13. 2026-08-15 01:30 UTCEPSS rescore
  14. 2026-08-14 20:17 UTCVendor advisory
  15. 2026-08-13 22:26 UTCEG score recompute
  16. 2026-08-13 22:26 UTCVendor advisory
  17. 2026-08-13 22:00 UTCEPSS rescore
  18. 2026-08-13 00:35 UTCEG score recompute
  19. 2026-08-13 00:35 UTCVendor advisory
  20. 2026-08-12 13:51 UTCEPSS rescore
  21. 2026-08-12 02:45 UTCEG score recompute
  22. 2026-08-12 02:45 UTCVendor advisory
  23. 2026-08-11 04:54 UTCEG score recompute
  24. 2026-08-11 04:54 UTCVendor advisory
  25. 2026-08-11 00:00 UTCEPSS rescore
  26. 2026-08-10 07:04 UTCEG score recompute
  27. 2026-08-10 07:04 UTCVendor advisory
  28. 2026-08-09 13:46 UTCEPSS rescore
  29. 2026-08-09 09:13 UTCEG score recompute
  30. 2026-08-09 09:13 UTCVendor advisory
  31. 2026-08-08 16:37 UTCEPSS rescore
  32. 2026-08-08 11:23 UTCEG score recompute
  33. 2026-08-08 11:23 UTCVendor advisory
  34. 2026-08-07 13:32 UTCVendor advisory
  35. 2026-08-06 15:42 UTCEG score recompute
  36. 2026-08-06 15:42 UTCVendor advisory
  37. 2026-08-06 13:47 UTCEPSS rescore
  38. 2026-08-05 19:17 UTCEPSS rescore
  39. 2026-08-05 17:51 UTCVendor advisory
  40. 2026-08-04 20:01 UTCEG score recompute
  41. 2026-08-04 20:01 UTCVendor advisory
  42. 2026-08-04 15:10 UTCEPSS rescore
  43. 2026-08-04 10:39 UTCEPSS rescore
  44. 2026-08-03 22:10 UTCEG score recompute
  45. 2026-08-03 22:10 UTCVendor advisory
  46. 2026-08-03 10:36 UTCEPSS rescore
  47. 2026-08-03 00:20 UTCVendor advisory
  48. 2026-08-02 02:29 UTCEG score recompute
  49. 2026-08-02 02:29 UTCVendor advisory
  50. 2026-08-02 02:27 UTCEPSS rescore
  51. 2026-08-01 04:38 UTCEG score recompute
  52. 2026-08-01 04:16 UTCEPSS rescore
  53. 2026-07-31 06:48 UTCEG score recompute
  54. 2026-07-31 06:48 UTCVendor advisory
  55. 2026-07-30 16:28 UTCEPSS rescore
  56. 2026-07-30 08:57 UTCEG score recompute
  57. 2026-07-30 01:30 UTCEPSS rescore
  58. 2026-07-29 11:07 UTCEG score recompute
  59. 2026-07-28 15:37 UTCEPSS rescore
  60. 2026-07-27 15:23 UTCEG score recompute
  61. 2026-07-27 07:49 UTCEG score recompute
  62. 2026-07-26 09:58 UTCEG score recompute
  63. 2026-07-26 09:58 UTCVendor advisory
  64. 2026-07-25 14:18 UTCEPSS rescore
  65. 2026-07-24 14:18 UTCEPSS rescore
  66. 2026-07-23 14:18 UTCEPSS rescore
  67. 2026-07-23 03:17 UTCEG score recompute
  68. 2026-07-22 22:56 UTCEG score recompute
  69. 2026-07-22 22:56 UTCVendor advisory
  70. 2026-07-22 14:08 UTCEPSS rescore
  71. 2026-07-21 23:11 UTCEG score recompute
  72. 2026-07-21 21:38 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-47254?
CVE-2026-47254 is a medium vulnerability published on July 21, 2026. libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, Track::initsampletimingtable() in libheif/sequences/track.cc stores an out-of-bounds chunk index (mchunks.size()) into mpresentationtimeline when the number of chunks defined in the stco box is less than the number…
When was CVE-2026-47254 disclosed?
CVE-2026-47254 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-2026-47254 actively exploited?
CVE-2026-47254 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 91.5% of all scored CVEs.
What is the CVSS score of CVE-2026-47254?
CVE-2026-47254 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-47254?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47254, 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.

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