CVE-2026-42308: Pillow: Integer overflow when processing fonts
CVE-2026-42308 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:N/VI:N/VA:L/SC:N/SI:N/SA:N· base score 5.1, scored by GitHub_MAttack vector: local. Attack complexity: low. Attack requirements: none. Privileges required: none. User interaction: none. Confidentiality impact on the vulnerable system: none. Integrity impact on the vulnerable system: none. Availability impact on the vulnerable system: low. 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
- EPSS
- 0.11% chance of exploitation in the next 30 days (1st percentile). FIRST EPSS, .
- CISA SSVC
- Exploitation: none observed. Automatable: no. Technical impact: partial. 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-2026-42308; each belongs to its advisory, not to every product listed. How records are collected and checked.
Description
Pillow is a Python imaging library. Prior to version 12.2.0, if a font advances for each glyph by an exceeding large amount, when Pillow keeps track of the current position, it may lead to an integer overflow. This issue has been patched in version 12.2.0.
Text from the CVE.org record (GitHub_M).
Vendor advisories for CVE-2026-42308
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.
References
- CVE-2026-42308 recordCVE.org
- CVE-2026-42308 detailNVD
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-wjx4-4jcj-g98jx_refsource_confirm
- https://github.com/python-pillow/Pillow/releases/tag/12.2.0x_refsource_misc
Timeline
- CVE record published
- CVE record last updated
- First vendor advisory listed by VulniPulse
More Splunk advisories
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