CVE-2026-55497

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, the built-in thumbnail and avatar image decoders limit compressed file size but do not limit decoded pixel dimensions, allowing an authenticated user to submit a small PNG, JPEG, or GIF that triggers an unbounded allocation and terminates the Cloudreve process through fatal out-of-memory behavior. This issue is fixed in version 4.17.0.

CVSS v3.1

6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1

6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.29% chance of exploitation in the next 30 days, 22th percentile

Published

2026-07-31

Proof-of-concept exploits (1)

• advisories/GHSA-g9j2-8w95-3vwv

References

• CVE Record
• NVD entry

Related

• CVE-2026-55496
• CVE-2026-55499
• CVE-2026-55495
• CVE-2026-55500
• CVE-2026-5549
• CVE-2026-55501