How severe is CVE-2026-11403?

CVE-2026-11403 has a CVSS 4.0 base score of 8.7, rated high severity.

Is CVE-2026-11403 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-11403?

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.

When was CVE-2026-11403 published?

CVE-2026-11403 was published on 2026-07-14 and last updated on 2026-07-15.

CVE-2026-11403

CVE-2026-11403 is a high-severity vulnerability with a CVSS 4.0 base score of 8.7. 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-331.

Key facts

Severity: High (CVSS 4.0 base score 8.7)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-331
Published: 2026-07-14
Last modified: 2026-07-15

Description

A vulnerability in Sonatype Nexus Repository Manager's format-specific API key generation may allow a remote attacker to gain unauthorized access to repository operations as a targeted user. A format-specific API key realm (NuGet API Key, Docker Bearer Token, or npm Bearer Token) must be enabled and the targeted user must have an active API key for this vulnerability to be exploitable.

Frequently asked questions

What is CVE-2026-11403?: A vulnerability in Sonatype Nexus Repository Manager's format-specific API key generation may allow a remote attacker to gain unauthorized access to repository operations as a targeted user. A format-specific API key realm (NuGet API Key, Docker Bearer Token, or npm Bearer Token) must be enabled and the targeted user must have an active API key for this vulnerability to be exploitable.
How severe is CVE-2026-11403?: CVE-2026-11403 has a CVSS 4.0 base score of 8.7, rated high severity.
Is CVE-2026-11403 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-11403?: 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.
When was CVE-2026-11403 published?: CVE-2026-11403 was published on 2026-07-14 and last updated on 2026-07-15.

References

Other CWE-331 vulnerabilities

CVE-2026-38447 — Critical (CVSS 9.8): osTicket 1.18.3 generates API keys using a predictable construction based on MD5 hashing. The use of MD5, combined with…
CVE-2020-36925 — Critical (CVSS 9.8): Arteco Web Client DVR/NVR contains a session hijacking vulnerability with insufficient session ID complexity that…
CVE-2025-47781 — Critical (CVSS 9.8): Rallly is an open-source scheduling and collaboration tool. Versions up to and including 3.22.1 of the application…
CVE-2024-47945 — Critical (CVSS 9.8): The devices are vulnerable to session hijacking due to insufficient entropy in its session ID generation algorithm.…
CVE-2024-25730 — Critical (CVSS 9.8): Hitron CODA-4582 and CODA-4589 devices have default PSKs that are generated from 5-digit hex values concatenated with a…
CVE-2023-49599 — Critical (CVSS 9.8): An insufficient entropy vulnerability exists in the salt generation functionality of WWBN AVideo dev master commit…

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