What is CVE-2026-34626?

CVE-2026-34626 is a medium-severity vulnerability in Adobe Acrobat Reader, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 6.3/10. Published 2026-04-14.

How severe is CVE-2026-34626?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Prototype Pollution in Adobe Acrobat Reader

CVE-2026-34626

Acrobat Reader versions 26.001.21411, 24.001.30360, 24.001.30362 and earlier are affected by an Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability that could result in arbitrary file sys…

Vulnerability class: Prototype Pollution

EPSS: 0.001 (20.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N.

Affected products

Adobe Acrobat Reader — versions 0

Weakness classification (CWE)

CWE-1321 — Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

References

helpx.adobe.com/security/products/acrobat/apsb26-44.html (vendor-advisory)

Frequently asked questions

What is CVE-2026-34626?: CVE-2026-34626 is a medium-severity vulnerability in Adobe Acrobat Reader, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 6.3/10. Published 2026-04-14.
How severe is CVE-2026-34626?: Medium severity. CVSS v3 base score is 6.3 out of 10.