Signal is active with 4 mentions in latest observed window
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NVD description
NuGet Gallery is a package repository that powers nuget.org. A security vulnerability exists in the NuGetGallery backend job’s handling of .nuspec files within NuGet packages. An attacker can supply a crafted nuspec file with malicious metadata, leading to cross package metadata injection that may result in remote code execution (RCE) and/or arbitrary blob writes due to insufficient input validation. The issue is exploitable via URI fragment injection using unsanitized package identifiers, allowing an attacker to control the resolved blob path. This enables writes to arbitrary blobs within the storage container, not limited to .nupkg files, resulting in potential tampering of existing content. This issue has been patched in commit 0e80f87628349207cdcaf55358491f8a6f1ca276.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
STABLE
| Date | Total | Labels |
|---|
| 2026-04-14 | 1 | Disclosure1 |
| 2026-04-15 | 4 | Disclosure3General1 |
CVE-2026-39399: NuGetGallery Input Validation Flaw - What It Means for Your Business and How to Respond https://hubs.li/Q04c9J7p0
Post summary
The excerpt merely lists the CVE identifier and a link, with no detailed information on the vulnerability, exploitation, or mitigations.
Warning: Critical Metadata Injection in #NuGetGallery. CVE-2026-39399 CVSS: 9.6. This vulnerability can lead to remote code execution #RCE and arbitrary blob writes! #Patch #Patch #Patch
Post summary
The text announces CVE-2026-39399 in NuGetGallery, noting its high severity and potential for remote code execution, but provides no patch, PoC, or exploit details.
CVE-2026-39399 NuGet Gallery is a package repository that powers http://nuget.org. A security vulnerability exists in the NuGetGallery backend job’s handling of .nuspec files within NuGet … https://www.cve.org/CVERecord?id=CVE-2026-39399
Post summary
The post announces CVE‑2026‑39399 as a vulnerability in NuGet Gallery’s processing of .nuspec files, but offers no details on exploitation, mitigation, or PoC.
CVE-2026-39399 Cross Package Metadata Injection Leading to Remote Code Execution in NuGet Gallery https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-39399
Post summary
The text references CVE‑2026‑39399, describing a metadata injection flaw in NuGet Gallery that permits remote code execution, but it provides no PoC, exploit, or patch details.
🚨 CVE-2026-39399: NuGet Gallery: Arbitrary Blob Ov... URI fragment injection in .nuspec parsing lets attackers write arbitrary blobs to NuGet's storage—RCE through package m... https://zerodaysignal.com/vulnerability/CVE-2026-39399 #netsec #vulnerability #CVE #sysadmin #zeroday
Post summary
The tweet announces CVE‑2026‑39399, noting a URI fragment injection in NuGet Gallery’s .nuspec parsing that permits arbitrary blob writes and potential RCE, but it provides only high‑level vulnerability details without PoC, exploit code, or patch information.