Medium 6.5Published Jul 30, 2026

CVE-2026-55497Cloudreve: Server crash through image decompression/pixel bomb in thumbnail & avatar decoding (DoS)

Updated under an hour ago (Oct 28, 2026, 9:10 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for cloudreve

Exploited in the last 30 days

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: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-400, CWE-409, CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jul 31, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

cloudreve cloudreve cloudreve:cloudreve (from the name)	before 4.17.0	CNA record

References

References

https://github.com/cloudreve/cloudreve/security/advisories/GHSA-g9j2-8w95-3vwv	x-refsource-confirm
https://github.com/cloudreve/cloudreve/commit/3607f79bb44c35d0be4fa8b6e24c0502b51415a9	x-refsource-misc
https://github.com/cloudreve/cloudreve/releases/tag/4.17.0	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.