Is CVE-2026-42308 in the CISA KEV catalog?

No. CVE-2026-42308 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-42308?

CVE-2026-42308 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2026-42308?

CVE-2026-42308 has an EPSS score of 0.11% (2th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-42308?

Upgrade pillow on debian 13 to 11.1.0-5+deb13u3 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2026-42308

MEDIUM

5.5

CVSS v3

NVD

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.

CWE-190Integer Overflow

How to fix

Remediation Available

pillowDebian

Fixed in:11.1.0-5+deb13u3CVE-2026-42308

Fixed in:12.2.0-1CVE-2026-42308

pillowUbuntu

Fixed in:9.0.1-1ubuntu0.4USN-8399-1

Fixed in:10.2.0-1ubuntu1.2USN-8399-1

Fixed in:11.3.0-1ubuntu1.3USN-8399-1

python3-pilUbuntu

Fixed in:9.0.1-1ubuntu0.4USN-8399-1

Fixed in:10.2.0-1ubuntu1.2USN-8399-1

Fixed in:11.3.0-1ubuntu1.3USN-8399-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.11%probability of exploitation in 30 days

2ndpercentile

Low risk: more likely to be exploited than 2% of all known CVEs.

References

Vendor Advisory1

github.com

Release Notes1

github.com

Related Vulnerabilities

Other CWE-190 (Integer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix
CVE-2019-11477	High	7.5	99%	-	Fix
CVE-2023-44443	High	7.8	94%	-	Fix
CVE-2014-0569	High	9.3	90%	-	-
CVE-2017-3599	High	7.5	90%	-	Fix
CVE-2023-21716	Critical	9.8	82%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-12.