Cross-site request forgery in EC2 Fleet - CVE-2026-57295
Published: June 29, 2026
Vulnerability identifier: #VU135790
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-57295
CWE-ID: CWE-352
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform cross-site request forgery attacks.
The vulnerability exists due to insufficient validation of the HTTP request origin. A remote user can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.
Affected software
EC2 Fleet
How to mitigate CVE-2026-57295
Install updates from vendor's website.
EC2 Fleet - update to 4.2.3.540.va_6eedb_7b_c112