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VulnerabilityPublished Updated

CVE-2026-97026: Red Hat Enterprise Linux 10 · Creation of Temporary File With Insecure Permissions

Affects Red Hat Enterprise Linux 10Source CVE Database V5

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Not known to be exploited · CVSS 3.9 Low.

Data as of 13 Nov 2026, 12:10 UTC

CVSS 3.1 base score
3.9Low
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.13.9
EPSS
0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Enterprise Linux 10flatpakAffected–Fixed in–
Red Hat Enterprise Linux 7flatpakAffected–Fixed in–
Red Hat Enterprise Linux 8flatpakAffected–Fixed in–
Red Hat Enterprise Linux 9flatpakAffected–Fixed in–

AI-suggested

Red Hat advises setting a umask that does not allow other users to write to the cache directory, for example, umask 022. Note that more restrictive umasks (such as 027 or 077) may prevent the flatpak-system-helper from reading the temporary directory directly, causing fallback to less efficient copying with warnings.

Description

CVE-2026-97026 is a vulnerability in Flatpak on Red Hat Enterprise Linux 10 where temporary child repository directories are created with world-writable permissions (0777). On multi-user systems with permissive umask settings, other local users could read or modify these temporary directories during app or runtime installation, potentially causing installation failures (denial of service). However, tampered content will fail signature or digest verification and will not be trusted. The vulnerability requires local access and user interaction, with low impact on confidentiality and availability.

References

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