CVE-2026-47178
Medium · 6.1CVSS
6.1
EPSS
0.2%
Published
Jul 21, 2026
CISA due date
—
Cloudanix analysis
There is not enough public information yet to know what systems are affected or what the real-world risk is, so teams should monitor for vendor updates before taking action.
- Exploitation
- Other
- Attacker needs
- Other
- Complexity
- Theoretical
- Impact
- Other
- Component
- Other
- Class
- Other
- Remediation
- No Fix Yet
- Effort
- Other
- Patch risk
- Other
What it actually does
Insufficient public technical detail is available for this CVE based on the provided metadata. The affected product, vulnerable component, attack vector, privileges required, and impact class are not identified, so the technical behavior of the flaw cannot be reliably characterized without additional vendor advisory information.
Why it matters to the business
Current risk appears low based on the available metadata: it is not listed in CISA KEV, is not associated with ransomware use, has no known exploit maturity, and has a low EPSS score. However, because the affected products and fixed versions are not provided, organizations should not assume they are unaffected until vendor advisories and asset exposure are reviewed.
How an attack unfolds
No credible end-to-end exploitation narrative can be derived from the supplied information. There is no affected product, vulnerable interface, exploit prerequisite, payload behavior, or post-exploitation outcome identified. If later advisories confirm affected software, exploitation analysis should be updated around the specific attack surface, authentication requirements, and resulting impact.
How to fix it
No product-specific patch or mitigation can be recommended from the supplied data because affected products and fixed versions are not listed. Track the vendor advisory for this CVE, inventory potentially relevant products once identified, and apply the vendor-provided fixed version or mitigation as soon as it is available. Until details are published, maintain standard controls such as minimizing internet exposure, enforcing least privilege, and monitoring externally facing services.
How to confirm the fix worked
Validation is currently limited to intelligence tracking. Confirm whether the organization uses any product later identified as affected, then verify installed versions against the vendor’s fixed-version guidance. Where applicable, use software inventory, package manifests, vulnerability scanners updated with the latest CVE content, and vendor-recommended configuration checks to confirm remediation.
Typical attack path
- Monitor vendor or vulnerability intelligence sources for publication of affected product details.
- Determine whether the vulnerable product or component exists in the target environment.
- Identify exposed instances or reachable attack surfaces once product details are known.
- Attempt exploitation only if a working exploit path becomes public or can be derived from vendor technical details.
- Leverage any resulting access or impact according to the confirmed vulnerability class.
How to detect it
There are no reliable exploitation artifacts, log patterns, filenames, process names, network signatures, or behavioral indicators derivable from the provided metadata. SOC teams should monitor vulnerability intelligence feeds for affected product details and then pivot to the relevant telemetry sources for that technology, such as application logs, authentication logs, web server logs, endpoint telemetry, package inventories, and network traffic records. Until technical details are published, avoid creating overly broad detection rules that could generate false positives.
What your security team should do
- Track this CVE for updated vendor advisories, affected product listings, and fixed-version information.
- Do not prioritize emergency response solely from the current metadata; EPSS is low, KEV status is false, and no exploit maturity is reported.
- Once affected products are published, map them against the software and asset inventory to determine exposure.
- Update vulnerability scanners and SBOM tooling so future detections for this CVE are captured automatically.
- Prepare to reassess priority if exploit code, threat actor activity, KEV listing, ransomware use, or high-value affected products are later confirmed.
The record
libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.19.0 through 1.21.2, a crafted HEIF file (uncompressed `unci` codec, tiled, component-interleaved, 4:2:0) triggers a heap out-of-bounds write in libheif's uncompressed tile decoder. The write overwrites the C++ vtable pointer of an adjacent `unc_decoder_component_interleave` object; the next virtual call dispatches to an attacker-chosen address. Version 1.22.0 patches the issue.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| openSUSE:Leap 16.0 | libheif | 0 | 1.23.0-160000.1.1 |
| openSUSE:Tumbleweed | libheif | 0 | 1.22.2-1.1 |
Related vulnerabilities
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- CVE-2026-47714 libheif is a HEIF and AVIF file format decoder and encoder. Also affects libheif
- CVE-2026-49271 libheif is a HEIF and AVIF file format decoder and encoder. Also affects libheif