How severe is CVE-2026-46728?

CVE-2026-46728 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-46728 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-46728?

CVE-2026-46728 primarily affects Denx U-boot. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-46728?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-46728 have an EU (EUVD) identifier?

Yes. CVE-2026-46728 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30673.

When was CVE-2026-46728 published?

CVE-2026-46728 was published on 2026-05-16 and last updated on 2026-07-14.

CVE-2026-46728

CVE-2026-46728 is a high-severity vulnerability in Denx U-boot with a CVSS 3.x base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-346.

Key facts

Severity: High (CVSS 3.x base score 8.2)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30673
Weakness: CWE-346
Affected product: Denx U-boot
Published: 2026-05-16
Last modified: 2026-07-14

Description

Das U-Boot before 2026.04 allows FIT (Flat Image Tree) signature verification bypass because hashed-nodes is omitted from a hash.

Frequently asked questions

What is CVE-2026-46728?: Das U-Boot before 2026.04 allows FIT (Flat Image Tree) signature verification bypass because hashed-nodes is omitted from a hash.
How severe is CVE-2026-46728?: CVE-2026-46728 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-46728 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-46728?: CVE-2026-46728 primarily affects Denx U-boot. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-46728?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-46728 have an EU (EUVD) identifier?: Yes. CVE-2026-46728 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30673.
When was CVE-2026-46728 published?: CVE-2026-46728 was published on 2026-05-16 and last updated on 2026-07-14.

References

Affected products (2)

cpe:2.3:a:denx:u-boot:*:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:*:*:*:*:*:*:*:*

More vulnerabilities in Denx U-boot

CVE-2022-34835 — Critical (CVSS 9.8): In Das U-Boot through 2022.07-rc5, an integer signedness error and resultant stack-based buffer overflow in the "i2c…
CVE-2022-30767 — Critical (CVSS 9.8): nfs_lookup_reply in net/nfs.c in Das U-Boot through 2022.04 (and through 2022.07-rc2) has an unbounded memcpy with a…
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CVE-2019-14204 — Critical (CVSS 9.8): An issue was discovered in Das U-Boot through 2019.07. There is a stack-based buffer overflow in this nfs_handler reply…
CVE-2019-14203 — Critical (CVSS 9.8): An issue was discovered in Das U-Boot through 2019.07. There is a stack-based buffer overflow in this nfs_handler reply…
CVE-2019-14202 — Critical (CVSS 9.8): An issue was discovered in Das U-Boot through 2019.07. There is a stack-based buffer overflow in this nfs_handler reply…

All CVEs affecting Denx U-boot →

Other CWE-346 vulnerabilities

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CVE-2023-49899 — Critical (CVSS 9.8): An unauthenticated remote attacker can execute any command on the affected device due to not correctly verifying the…
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Browse all CWE-346 vulnerabilities →