CVE-2026-27820: zlib: Buffer Overflow in Zlib::GzipReader ungetc via large input leads to memory corruption

Overview

Severity

N/A

Exploit Status

Not Exploited

Patch Tuesday

2026-Apr

Released

2026-04-18

EPSS Score

0.04% (percentile: 12.7%)

Affected Products (1)

Other

• 21222-17084

Revision History

• 2026-04-18: Information published.