CVE-2026-55497GHSA-G9J2-8W95-3VWVGO-2026-6100
Cloudreve: Server crash through image decompression/pixel bomb in thumbnail & avatar decoding (DoS)
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 4.17.0, 4.0.0-20260613024411-3607f79bb44c
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: poc
- Automatable: no
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: poc · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- cloudreve cloudreve
fixed in 4.17.0
- github.com/cloudreve/Cloudreve/v4Go
fixed in 4.0.0-20260613024411-3607f79bb44c
- github.com/cloudreve/Cloudreve/v3Go
through 3.0.0-20250225100611-da4e44b77af4
- github.com/cloudreve/CloudreveGo
All versions
- github.com/cloudreve/Cloudreve/v3Go
All versions