CVE-2026-87766

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.21% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 11.3% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-10-20.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-09 08:34Z1 MO AGO

Last updated

2026-10-19 23:12Z9 DAYS AGO

Reserved

2026-09-09

Assigning CNA

redhat

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

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

Weaknesses

• CWE-59Improper Link Resolution Before File Access ('Link Following')Base

Data version

5.2

Document digest

9d934cb6e72cddc6b58b08456ec47694fd814ca0bbdf6485f3d65679a423dd6a

• access.redhat.comRHSA-2026:85306https://access.redhat.com/errata/RHSA-2026:85306vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:85308https://access.redhat.com/errata/RHSA-2026:85308vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:85309https://access.redhat.com/errata/RHSA-2026:85309vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:85312https://access.redhat.com/errata/RHSA-2026:85312vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:85313https://access.redhat.com/errata/RHSA-2026:85313vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:85317https://access.redhat.com/errata/RHSA-2026:85317vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:85319https://access.redhat.com/errata/RHSA-2026:85319vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:85322https://access.redhat.com/errata/RHSA-2026:85322vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:85324https://access.redhat.com/errata/RHSA-2026:85324vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:85325https://access.redhat.com/errata/RHSA-2026:85325vendor-advisoryx_refsource_REDHAT
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-87766vdb-entryx_refsource_REDHAT
• bugs.debian.orghttps://bugs.debian.org/1145655
• bugzilla.redhat.comRHBZ#2530542https://bugzilla.redhat.com/show_bug.cgi?id=2530542issue-trackingx_refsource_REDHAT
• github.comhttps://github.com/containers/bubblewrap/releases/tag/v0.12.0
• github.comhttps://github.com/containers/bubblewrap/security/advisories/GHSA-pxhw-h44j-8pfx
• www.openwall.comhttps://www.openwall.com/lists/oss-security/2026/08/27/7
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/09/09/3
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/09/22/23