Arbitrary file read via prototype pollution
Published Apr 14, 2026 · Updated Apr 14, 2026
Prototype pollution in Adobe Acrobat Reader 26.001.21411 and earlier allows attackers to read arbitrary local files via a malicious PDF. Adobe has not published the affected object-processing locus or the untrusted property assignment that pollutes the prototype chain. A victim must open the malicious file; exploitation reads files accessible to the current user without modifying them.
Summary
What happened
Prototype pollution in Adobe Acrobat Reader 26.001.21411 and earlier allows attackers to read arbitrary local files via a malicious PDF. Adobe has not published the affected object-processing locus or the untrusted property assignment that pollutes the prototype chain. A victim must open the malicious file; exploitation reads files accessible to the current user without modifying them.
The record
- CVE
- CVE-2026-34626
- Published
- Apr 14, 2026
- Updated
- Apr 14, 2026
- Vendor
- Adobe
- Product
- Adobe Acrobat Reader
- Classifications
- CWE-1321, T1204.002, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 14, 2026CVE publishedPublication date reported by the CVE source.
- Apr 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=26.001.21411
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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