CVE-2026-87766 bubblewrap - Path Traversal

bubblewrap before 0.12.0 contains a path traversal caused by following parent symlinks via /oldroot during sandbox setup, letting attackers write files outside the sandbox as the launching user, exploit requires sandbox setup.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.15% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Path Traversal
Impact
Data Tampering
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published
9 September 2026
Updated
15 October 2026
Weakness
CWE-59

Vendor fix

Update to version 0.12.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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