CVE-2026-110649
CRITICAL 9.3Stills before 25.24.2 contains an OS command injection vulnerability that allows attackers to execute shell commands by supplying crafted media file paths. Attackers can name a media file with $(...) or backticks to execute operating system commands with Node.js process privileges when ffmpeg, ffprobe, gifsicle, or convert runs.
Severe if exploited (CVSS 9.3), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
2.5%chance of exploitation in 30 days · 85th percentile
Impact if exploited
9.3CVSS 4.0 · CRITICAL
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityHigh
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ✓Privileges: No account or privileges required
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
- ✓Requirements: No special attack requirements
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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Data snapshot:
Weakness (CWE)
- CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References and research data (JSON)
All CVSS metrics
- CRITICAL 9.3 v4.0 · CNA Primary
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - CRITICAL 9.8 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CRITICAL 9.3 v4.0 · NVD Secondary
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CRITICAL 9.8 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
Patches & mitigations
- https://github.com/shahkashani/stills/pull/29 CVE record · VulnCheck · Updated 2026-10-14T14:17:16.991Z
NVD · CVE-2026-110649 · Updated 2026-10-16T19:18:44.867 - https://github.com/shahkashani/stills/pull/30 CVE record · VulnCheck · Updated 2026-10-14T14:17:16.991Z
NVD · CVE-2026-110649 · Updated 2026-10-16T19:18:44.867 - https://github.com/shahkashani/stills/commit/5694b3b0dcd2da342f4f0497244129d4c9eb73bc CVE record · VulnCheck · Updated 2026-10-14T14:17:16.991Z
NVD · CVE-2026-110649 · Updated 2026-10-16T19:18:44.867 - https://github.com/shahkashani/stills/commit/51ba953983ba99915331607bf8530e6089952253 CVE record · VulnCheck · Updated 2026-10-14T14:17:16.991Z
NVD · CVE-2026-110649 · Updated 2026-10-16T19:18:44.867
Advisories
- https://www.vulncheck.com/advisories/stills-before-25.24.2-os-command-injection-via-media-file-names CVE record · VulnCheck · Updated 2026-10-14T14:17:16.991Z
NVD · CVE-2026-110649 · Updated 2026-10-16T19:18:44.867 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-101277 EUVD · EUVD-2026-101277
Technical & other
- https://github.com/shahkashani/stills/blob/66d5def1265b817d84524473a2813e4781dcbd80/lib/stills/frames.js#L106-L108 CVE record · VulnCheck · Updated 2026-10-14T14:17:16.991Z
NVD · CVE-2026-110649 · Updated 2026-10-16T19:18:44.867 - https://github.com/shahkashani/stills/blob/66d5def1265b817d84524473a2813e4781dcbd80/lib/content/video.js#L58-L60 CVE record · VulnCheck · Updated 2026-10-14T14:17:16.991Z
NVD · CVE-2026-110649 · Updated 2026-10-16T19:18:44.867