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) @ resolute2026-09-20ubuntu

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 ... 1.23.2-1 (34 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libheif1.19.8-1 ... 1.21.2-4 (8 versions)1.23.1-1—

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 14× in last 7d / 63× 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 141 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 91.3% 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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