High severity · published Oct 14, 2026
CVE-2026-92153
F´: Arbitrary File Write in Svc::FileUplink via attacker-controlled StartPacket.destinationPath
7.1
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FP
fprime · nasa
< 4.3.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-92153
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-92153
x_refsource_CONFIRM
https://github.com/nasa/fprime/security/advisories/GHSA-5rfj-hw2g-vwmv
x_refsource_MISC
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
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