Vulnerability · Published Oct 14, 2026 · Assigned by GitHub_M

CVE-2026-92153F´: Arbitrary File Write in Svc::FileUplink via attacker-controlled StartPacket.destinationPath

High 7.1

In plain English

A high-severity path traversal in fprime from nasa. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).

Severity (CVSS 3.1)7.1High

Exploit odds (30 days)0.4%top 61.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

F´ (F Prime) is a framework that enables development and deployment of spaceflight and other embedded software applications. Prior to 4.3.0, Svc::FileUplink handling of Fw::FilePacket::StartPacket destination paths FileUplink copies the packet-controlled destinationPath and opens it for writing without canonicalization or confinement to an upload directory. When a peer able to send file-uplink packets supplies an absolute, traversing, or otherwise attacker-selected writable destination path, files can be created or overwritten at attacker-selected writable filesystem locations, affecting integrity and potentially availability. This issue is fixed in version 4.3.0.

Affected products (as reported)

Vendor	Product	Versions
nasa	fprime	< 4.3.0

Weakness: CWE-22, CWE-73 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

References

https://github.com/nasa/fprime/security/advisories/GHSA-5rfj-hw2g-vwmv x_refsource_CONFIRM
https://github.com/nasa/fprime/pull/5320 x_refsource_MISC
https://github.com/nasa/fprime/commit/4c8b9c0b8692b0d47cbd5f2ccec61c74aa02b893 x_refsource_MISC
https://github.com/nasa/fprime/releases/tag/v4.3.0 x_refsource_MISC