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High 1 vendor · 1 advisory

CVE-2026-42311: Pillow: OOB Write with Invalid PSD Tile Extents (Integer Overflow)

CVE-2026-42311 key facts

CISA KEV
Not listed (catalogue checked )
Highest advisory rating
High
CVSS vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N · base score 8.6, scored by GitHub_MAttack vector: local. Attack complexity: low. Attack requirements: none. Privileges required: none. User interaction: none. Confidentiality impact on the vulnerable system: high. Integrity impact on the vulnerable system: high. Availability impact on the vulnerable system: high. Confidentiality impact on subsequent systems: none. Integrity impact on subsequent systems: none. Availability impact on subsequent systems: none.
Weakness
  • CWE-190: Integer Overflow or Wraparound
  • CWE-787: Out-of-bounds Write
EPSS
0.15% chance of exploitation in the next 30 days (4th percentile). FIRST EPSS, .
CISA SSVC
Exploitation: none observed. Automatable: yes. Technical impact: total. CISA, .
Vendor advisories
1 from Splunk
Assigned by
GitHub_M (CNA)
CVE record published
Listed by VulniPulse

Ratings, versions and fixes are quoted from the vendor advisories that cover only CVE-2026-42311; each belongs to its advisory, not to every product listed. How records are collected and checked.

Description

Pillow is a Python imaging library. From version 10.3.0 to before version 12.2.0, processing a malicious PSD file could lead to memory corruption, potentially resulting in a crash or arbitrary code execution. This issue has been patched in version 12.2.0.

Text from the CVE.org record (GitHub_M).

Vendor advisories for CVE-2026-42311

Splunk

1 advisory
  • Advisory severityHigh

    High [CVE-2024-34062 +48] Third-Party Package Updates in Splunk SOAR - October 2026

    SVD-2026-1012Source published

    This bulletin covers 49 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.

    Splunk remedied common vulnerabilities and exposures (CVEs) in third-party packages in Splunk SOAR version 8.7.0 or higher. Affected product named by the advisory: Splunk SOAR 8.7.

    Affected products in this advisory
    • Splunk SOAR 8.7
    Source-reported affected versions
    • Splunk SOAR Below 8.7.0
    Source-reported fixed versions
    • Splunk SOAR 8.7.0
    Mitigation guidance
    • Upgrade Splunk SOAR to version 8.7.0 or higher.
    Full advisory and evidenceOpen source bulletin

References

Timeline

  1. CVE record published
  2. CVE record last updated
  3. First vendor advisory listed by VulniPulse

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