CVE-2026-87766High· 8.8▾ Twilight

A flaw was found in bubblewrap

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score48/ 100 · Moderate

impact 48.4 · likelihood 0 · exploitation 0

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Proof of concept

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Published

Sep 9, 2026

Updated

Sep 22, 2026

CVSS

8.8

Vendor

Red Hat

Product

bubblewrap

CWE

CWE-59

Depth score

48 · Moderate

EPSS

0.21% · p11

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CISA SSVC

decided 2026-09-09

Exploitation: none
Automatable: no
Technical impact: total

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Sep 9.

0.1% → 0.2%▲ 0.07%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

4 events · 47 days

Sep 9, 2026Published
Disclosed via NVD
Sep 9, 2026EPSS first tracked
0.1%
Sep 22, 2026Record revised
Last analysed / modified upstream
Oct 26, 2026EPSS peak
0.1% → 0.2%

Red Hat CWE-59 #nvd #cve.org

Affected

bubblewrap (all versions)
bubblewrap (all versions)
bubblewrap (all versions)
bubblewrap

Full technical detail▾

Overview

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org