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Vulnerabilities

Vulnerability · CVE-2026-55798

CVE-2026-55798 is listed by Pillow is a Python imaging library..

Published Jul 6, 2026 · catalog updated Oct 25, 2026 · the affected product

Last checked Nov 8, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-55798. EPSS is 0.18%. Act only if a listed version of the affected product is installed.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium4.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.18%
Remediation
Version ranges on file
Affected products
cpe python/pillow

CVE-2026-55798 is listed by Pillow is a Python imaging library..

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe python/pillow< 12.3.0

How to fix CVE-2026-55798

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-55798. EPSS is 0.18%. Act only if a listed version of the affected product is installed.

Which versions are affected?

Compare what you have installed with < 12.3.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-78: OS Command Injection. EPSS 0.18%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Pillow security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 6, 2026 · Monitored products — high

    Detected

    CVE-2026-55798 is listed by Pillow is a Python imaging library..

  2. Oct 25, 2026 · Monitored products — high

    Updated

    CVE-2026-55798 is listed by Pillow is a Python imaging library..

Sources

  • CVE.orgVulnerability recordCVE-2026-55798

    Official CVE identifier

    cve.org
  • Monitored products — highVendor advisoryCVE-2026-55798

    Pillow is a Python imaging library. Prior to 12.3.0, WindowsViewer.get_command() constructed a cmd.exe shell command by directly embedding a file path into an f-string without escaping and passed the result to subprocess.Popen(..., shell=True), allowing shell metacharacters in the file path to inject arbitrary cmd.exe commands. This issue is fixed in version 12.3.0.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 8, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 8, 2026
  • Monitored products — highNov 8, 2026