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VulnerabilityPublished

CVE-2026-41219: F5 BIG-IP · Sensitive Data in Logs

Affects F5 BIG-IPSource CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium : upgrade to 17.5.1.4 or 17.1.3.1 when convenient.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 20% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 17.5.1.4, 17.1.3.1, 8.4.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 13 May 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 29 Oct 2026.

What to do

Upgrade BIG-IP to 17.5.1.4 or 17.1.3.1; BIG-IQ to 8.4.1.

Affected software

ProductAffectedFixed in
F5BIG-IPAffected
  • >=17.5.0 <17.5.1.4
  • >=17.1.0 <17.1.3.1
  • >=16.1.0
Fixed in
  • 17.5.1.4
  • 17.1.3.1
F5BIG-IQAffected
  • >=8.4.0 <8.4.1
Fixed in
  • 8.4.1

AI-suggested

If you cannot patch yet, restrict access to QKView files and limit permissions to trusted users only.

Description

CVE-2026-41219 is a medium severity vulnerability in F5 BIG-IP's QKView utility where improper sanitization allows a low-privileged attacker to read sensitive information from a QKView file. This issue affects versions 16.1.0, 17.1.0, and 17.5.0. The vulnerability does not impact integrity or availability but compromises confidentiality.

References

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