CVE-2026-47709
Medium · 5.5CVSS
5.5
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 action is required, but there is currently no indication of active widespread exploitation.
- Exploitation
- Other
- Attacker needs
- Other
- Complexity
- Moderate
- Impact
- Other
- Component
- Other
- Class
- Other
- Remediation
- Other
- Effort
- Other
- Patch risk
- Other
What it actually does
Insufficient public technical detail is available for this vulnerability. With no description, affected product list, vulnerable component, or fixed-version data provided, the specific vulnerability class, attack preconditions, privileges required, and resulting impact cannot be determined reliably. Treat it as an uncharacterized vulnerability until authoritative vendor or CNA details are available.
Why it matters to the business
The immediate business risk appears low based on the currently provided metadata: it is not listed in CISA KEV, is not known to be used in ransomware campaigns, has no reported exploit maturity, and has a low EPSS score. However, because the affected products are unspecified, organizations cannot yet determine whether they are exposed; risk should be reassessed when vendor advisories or affected-version details become available.
How an attack unfolds
No reliable end-to-end exploitation narrative can be produced from the provided data because the vulnerable product, component, and flaw behavior are unknown. If future advisories identify affected software, an attacker would first need to locate exposed instances of that software, determine whether they are running a vulnerable version, and then apply the product-specific exploit conditions described by the vendor or researcher. At present, there is no evidence in the supplied data of public exploitation or weaponized exploit availability.
How to fix it
No product-specific patch or mitigation can be prescribed because no affected products or fixed versions were provided. Track the issuing CNA, vendor advisories, package maintainers, and vulnerability databases for affected-version and fixed-version details. Once available, upgrade to the vendor-designated fixed release, apply any recommended configuration mitigations, and prioritize internet-exposed deployments first. Until details are published, apply standard exposure-reduction controls: restrict administrative interfaces, enforce least privilege, disable unnecessary services, and ensure logging is enabled for potentially affected software stacks.
How to confirm the fix worked
Validate exposure only after affected product and version information is available. Recommended validation steps are: inventory software and package versions, compare them against the vendor’s vulnerable and fixed version ranges, confirm that patched versions are deployed, and verify that any temporary mitigations remain in place. If a detection rule or scanner plugin becomes available, use it to confirm both pre-remediation exposure and post-remediation closure. Avoid relying on the CVE identifier alone without product/version correlation.
Typical attack path
- Monitor public advisories and exploit repositories for newly released technical details.
- Identify whether any exposed or internal assets run the affected product once it is disclosed.
- Determine whether the deployed version falls within the vulnerable range.
- Attempt the product-specific exploit path if proof-of-concept or exploit details become available.
- Use any resulting access or impact to further the attacker’s objective, depending on the eventual vulnerability type.
How to detect it
Because the affected product and exploit behavior are unknown, there are no reliable product-specific indicators to search for. Security teams should monitor vulnerability intelligence feeds for updates and, once affected software is identified, review relevant application, authentication, web access, API gateway, endpoint, and system logs for anomalous activity during the exposure window. Until more detail is available, look for generic signs of exploitation such as unexpected service crashes, new or modified privileged accounts, unusual child processes spawned by application services, unexplained outbound network connections, suspicious file writes in application directories, and authentication or access patterns inconsistent with normal use. No named threat actors or campaigns are provided in the input.
What your security team should do
- Track vendor, CNA, NVD, and security-advisory updates for publication of affected products, vulnerable versions, and fixed versions.
- Create a watch item in vulnerability management tooling so assets can be reassessed automatically once product metadata is available.
- Do not treat this as an emergency based on the provided data alone; there is no KEV listing, known ransomware use, or reported exploit maturity.
- If affected software is later identified, prioritize internet-facing systems, privileged services, and business-critical systems for validation and patching.
- Monitor exploit intelligence sources for any change in exploit maturity, EPSS movement, threat actor reporting, or public proof-of-concept release.
The record
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.
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-2026-47178 libheif is a HEIF and AVIF file format decoder and encoder. Also affects libheif
- CVE-2026-47247 libheif is a HEIF and AVIF file format decoder and encoder. Also affects libheif
- CVE-2026-47254 libheif is a HEIF and AVIF file format decoder and encoder. Also affects libheif
- CVE-2026-47251 libheif is a HEIF and AVIF file format decoder and encoder. Also affects libheif
- 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