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CVE-2017-5940

27
FAUCET Score

CVE-2017-5940 is a high-severity sandbox escape vulnerability affecting Firejail versions before 0.9.44.6 and 0.9.38.10 LTS. It allows a local attacker with low privileges to bypass sandbox restrictions and access user files by exploiting an incomplete fix for CVE-2017-5180, specifically through symlink manipulation with the --private option. The vulnerability has a CVSS score of 8.8 (High) due to its potential for high impact on confidentiality, integrity, and availability, and its low attack complexity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.9.38, <= 0.9.38.10CPE matchmatch criteria
cpe:2.3:a:firejail_project:firejail:*:*:*:*:lts:*:*:*
>= 0.9.40, <= 0.9.44.6CPE matchmatch criteria
cpe:2.3:a:firejail_project:firejail:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.0
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.36%
Probability of exploitation in next 30 days
EPSS Percentile
28.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0036 is in the 67th percentile among its peer group of 16,994 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

firejail.wordpress.com / download-2/release-notes
Release NotesVendor Advisory
github.com / netblue30/firejail/commit/38d418505e9ee2d326557e5639e8da49c298858f
Issue TrackingPatchThird Party Advisory
github.com / netblue30/firejail/commit/903fd8a0789ca3cc3c21d84cd0282481515592ef
Issue TrackingPatchThird Party Advisory
github.com / netblue30/firejail/commit/b8a4ff9775318ca5e679183884a6a63f3da8f863
Issue TrackingPatchThird Party Advisory
security.gentoo.org / glsa/201702-03
Third Party Advisory
openwall.com / lists/oss-security/2017/01/31/16
Mailing ListPatchThird Party Advisory
securityfocus.com / bid/96221
Third Party AdvisoryVDB Entry