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High 8.8Published Sep 9, 2026

CVE-2026-87766Bubblewrap: bubblewrap: symlink traversal via /oldroot allows writing files outside sandbox during setup

Updated under an hour ago ()

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It affects Red Hat Enterprise Linux 10 and 7 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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A flaw was found in bubblewrap. During sandbox setup, creating files or directories under the new root can follow a parent symlink onto the host via /oldroot, writing attacker-chosen paths outside the sandbox as the launching user. This happens before the sandboxed process starts. This issue is GHSA-pxhw-h44j-8pfx. It is fixed in bubblewrap 0.12.0.

CVSS
8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE)
CWE-59
Known exploited
Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days)
Not loaded for this CVE
Assigned by
redhat
NVD analysis
Awaiting Analysis
Record last updated
Oct 19, 2026
First seen by InfoSec Signals
Oct 9, 2026

Affected products

Affected products
from 0:0.10.0-5.el10_2 not affected
CNA record
from 0:0.10.0-3.el10_0.4 not affected
CNA record
from 0:0.4.0-3.el8_4 not affected
CNA record
from 0:0.4.0-3.el8_4 not affected
CNA record
from 0:0.4.0-3.el8_8 not affected
CNA record
from 0:0.4.0-3.el8_8 not affected
CNA record
from 0:0.4.1-8.el9_6.1 not affected
CNA record
1
CNA record

References

References

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.

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