What’s Vulnerable › Vulnerabilities

CVE-2026-88361

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-24 · updated 2026-09-25
• Weakness: CWE-190

Description

SumatraPDF 3.6.1 contains an integer overflow vulnerability in EngineMupdf::BuildPageLabelRec() when parsing PDF PageLabels /Nums entries.

References

• https://github.com/chenjiefeng2001/sumatrapdf_folked/commit/b22a8c71ddc9de80ece5f88d14b434c20fee912e
• https://github.com/haimag/sumatrapdf/commit/8b999ff1bf0a8df244e75440682a3fd9a038eb2d
• https://github.com/sumatrapdfreader/sumatrapdf/issues/5952
• https://github.com/sumatrapdfreader/sumatrapdf/issues/5952

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