Infinite loop in Dropbox Lepton
Priority LOW 25CWE-835Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-835.
Summary
A loop with an unreachable exit condition can be triggered by passing a crafted JPEG file to the Lepton image compression tool, resulting in a denial-of-service.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00326 25th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Dropbox Lepton | 1.2 and current development build | — | No fix listed | CNA |
- Dropbox Lepton Vendor— Affected 1.2 and current development build Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:lepton_project:lepton:1.2:*:*:*:*:*:*:* | 1.2 | Vulnerable | Lepton Project |
- cpe:2.3:a:lepton_project:lepton:1.2:*:*:*:*:*:*:* Versions 1.2 Vulnerable ·Lepton Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2022-4104
- 2026-10-03 Alias added: GHSA-vrgf-3rc5-r59f
References
More Lepton Project Lepton vulnerabilities
- TI-2016-05343 The write_ujpg function in lepton/jpgcoder.cc in Dropbox lepton 1.0 allows remote… CVSS 3.0MEDIUM 5.5
- TI-2016-05342 The build_huffcodes function in lepton/jpgcoder.cc in Dropbox lepton 1.0 allows remote… CVSS 3.0MEDIUM 5.5
- TI-2016-05341 The setup_imginfo_jpg function in lepton/jpgcoder.cc in Dropbox lepton 1.0 allows remote… CVSS 3.0MEDIUM 5.5
- TI-2016-05340 The setup_imginfo_jpg function in lepton/jpgcoder.cc in Dropbox lepton 1.0 allows remote… CVSS 3.0MEDIUM 5.5
- TI-2016-05339 The process_file function in lepton/jpgcoder.cc in Dropbox lepton 1.0 allows remote… CVSS 3.0MEDIUM 5.5
Sources
- CVE-2022-4104 · CVE Program
- CVE-2022-4104 · NVD
- FIRST EPSS
- GHSA-vrgf-3rc5-r59f · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences