libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, the inline mask parsing code in libheif/region.cc contains an integer overflow. Both width and height are unsigned int (32-bit) values parsed from the HEIF file. Their product can exceed UINT32_MAX, wrapping to a small value before the division by 8. This causes an undersized buffer allocation, leading to out-of-bounds memory access when the mask data is later interpreted as a width x height bitmap. Version 1.22.0 patches the issue.
CVE-2026-47714
MEDIUMPre-NVD 6.16.1—Trending — 3 sources updated this week
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 6.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 99% 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
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.
- CVSS v3
- 6.1
- EG Score
- 6.1(medium)
- EG Risk
- 27(Track)EG Risk 27/100SSVC: 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 computedSeverity61% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 1%
- KEV
- Not listed
Published
July 21, 2026
Last Modified
July 22, 2026
Advisory Details (1)
Auto-updated Jul 21, 2026🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available
Integer overflow in inline mask size calculation causes undersized buffer allocation · Advisory · strukturag/libheif · GitHub
https://github.com/strukturag/libheif/security/advisories/GHSA-h4wm-6wwf-qvhxPatch Availability(2)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | libheif1 (1.21.2-3ubuntu0.3) @ resolute | 2026-07-26 | ubuntu |
| ubuntu | libheif1 (1.17.6-1ubuntu4.6) @ noble | 2026-07-26 | ubuntu |
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.
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 / 14× 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.
- 2026-07-28 15:37 UTCEPSS rescore
- 2026-07-27 08:46 UTCEG score recompute
- 2026-07-26 09:58 UTCEG score recompute
- 2026-07-26 09:58 UTCVendor advisory
- 2026-07-25 14:18 UTCEPSS rescore
- 2026-07-24 14:18 UTCEPSS rescore
- 2026-07-23 14:18 UTCEPSS rescore
- 2026-07-23 03:17 UTCEG score recompute
- 2026-07-22 22:56 UTCEG score recompute
- 2026-07-22 22:56 UTCVendor advisory
- 2026-07-22 14:08 UTCEPSS rescore
- 2026-07-21 21:22 UTCEG score recompute
- 2026-07-21 21:09 UTCEG score recompute
- 2026-07-21 21:08 UTCMITRE cvelistV5first tracked
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Same CWE
10 shownCWE-190
Frequently asked(5)
What is CVE-2026-47714?
CVE-2026-47714 is a medium vulnerability published on July 21, 2026. libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, the inline mask parsing code in libheif/region.cc contains an integer overflow. Both width and height are unsigned int (32-bit) values parsed from the HEIF file. Their product can exceed UINT32_MAX, wrapping…
When was CVE-2026-47714 disclosed?
CVE-2026-47714 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-47714 actively exploited?
CVE-2026-47714 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 98.7% of all scored CVEs.
What is the CVSS score of CVE-2026-47714?
CVE-2026-47714 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-47714?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47714, 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
Explore the affected products and dependency analysis for CVE-2026-47714
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