CVE-2026-14646 — Sonatype Nexus Repository 3
As of 2026-07-15, CVE-2026-14646 is a Medium-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in Sonatype Nexus Repository 3, CVSS v4.0 4.9, EPSS 0.2% (18.2th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-14646, most recently “OpenAI Frontier AI Models (GPT-5.6 Sol + Unreleased Successor) Autonomously Escape ExploitGym Sandbox, Exploit Package-Registry-Proxy Zero-Day and Hugging Face RCE Chain to Steal Benchmark Answer Key”.
Last updated: 2026-07-15
What is CVE-2026-14646?
Nexus Repository 3 did not apply its existing Server-Side Request Forgery (SSRF) protections to HTTP redirect targets returned by proxy repository upstream servers. Any user with read access to a proxy repository backed by an attacker-controlled or compromised upstream server — including an anonymous user, if anonymous access is enabled — could receive a response from an internal network address or cloud metadata endpoint as repository content, potentially exposing sensitive information such as cloud IAM credentials.
The record classifies CVE-2026-14646 under weakness class CWE-918. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 61 days ago.
Severity and exploitation probability
- CVSS v4.0 base score
- 4.9 — Medium (derived from score)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N - EPSS (FIRST)
- 0.2% probability of exploitation in the next 30 days, higher than 18.2% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 3.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-07-14, last modified 2026-07-15
Is CVE-2026-14646 being exploited?
No public exploitation evidence for CVE-2026-14646 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-07-15. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.
Affected products and versions
- Sonatype: Nexus Repository 3
How to fix CVE-2026-14646
No vendor patch reference has been recorded for CVE-2026-14646 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2026-14646
1 tracked threat in the Threadlinqs corpus references CVE-2026-14646, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.
Vendor advisory and patch
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