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Fencer Vulns
medium 6.1

CVE-2026-85518 json

Openscap: openscap: arbitrary file write via path traversal in source datastream decomposition

published 2026-10-21 18 d ago modified 2026-11-06 3 d ago also EUVD-2026-107542

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 39%
public exploits
0
none known

Summary

A flaw was found in OpenSCAP. When decomposing a Source DataStream (SDS) file, the application does not properly validate relative file path attributes, leading to a path traversal vulnerability. An attacker can exploit this flaw by tricking a user or automated system into decomposing a crafted datastream containing directory traversal sequences. Successful exploitation allows unauthorized file creation or modification outside the intended target directory with the permissions of the executing process.

Patch / fix

  • Red Hat Red Hat Hardened Images 1.4.5-2.1.hum1
  • openscap Debian 14 1.4.6+dfsg-1

debian advisories DEBIAN-CVE-2026-85518

  • openscap openSUSE Tumbleweed 1.4.6-1.1

opensuse advisories openSUSE-SU-2026:12249-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-85518 updated cvss 6.1

openscap: openscap: Arbitrary file write via path traversal in Source DataStream decomposition

  • Red Hat Enterprise Linux 6 openscap, openscap-perl, openscap-utils, openscap-python, openscap-content, openscap-scanner, +2 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 openscap, openscap-utils, openscap-python, openscap-scanner, openscap-selinux, openscap-containers, +2 more Red Hat Enterprise Linux 8 openscap, openscap-utils, openscap-python3, openscap-scanner, openscap-engine-sce
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux 9 openscap, openscap-utils, openscap-python3, openscap-scanner, openscap-engine-sce Red Hat Enterprise Linux 10 openscap
    affected: workaround, no fix available
  • Red Hat Hardened Images openscap 1.4.5-2.1.hum1, openscap-perl 1.4.5-2.1.hum1, openscap-utils 1.4.5-2.1.hum1, openscap-python3 1.4.5-2.1.hum1, openscap-scanner 1.4.5-2.1.hum1, openscap-containers 1.4.5-2.1.hum1, +1 more
    fixed: vendor fix RHSA-2026:88330

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
11 d ago

Exploit prediction

0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2478522 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L

Affected products

  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.