OS command injection in thumbnail Python package
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-78.
Summary
The thumbnail Python package through 1.5 contains an OS command injection flaw (CWE-78) in generate_thumbnail(). File paths containing shell metacharacters are passed into os.system() calls for ffmpeg, convert or unoconv without neutralization. An attacker who controls a file name, such as an uploaded file, can run commands with the privileges of the Python process.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
The thumbnail Python package through 1.5 contains an OS command injection vulnerability in generate_thumbnail() that allows attackers to execute commands by supplying shell metacharacters in file paths. Attackers who control a file name passed to generate_thumbnail, such as an uploaded file, can inject commands into os.system() calls running ffmpeg, convert or unoconv with the Python process privileges.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
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 |
|---|---|---|---|---|---|
| anshulkharb | thumbnail | up to 1.5 | — | No fix listed | CNA |
- thumbnail Vendoranshulkharb Affected up to 1.5 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for thumbnail.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-14 Threatist record created from CVE-2026-110650
- 2026-10-14 Alias added: GHSA-542h-xc5c-6hxm
- 2026-10-15 CISA SSVC decision points changed
- 2026-10-15 Priority changed: MEDIUM → HIGH
References
Sources
- CVE-2026-110650 · CVE Program
- CVE-2026-110650 · NVD
- FIRST EPSS
- GHSA-542h-xc5c-6hxm · GitHub Advisory Database · CC BY 4.0
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