Out-of-bounds Write Affecting openssl package, versions [1.1.0-alpha1, 1.1.1zi)[3.0.0-alpha1, 3.0.22)[3.4.0-alpha1, 3.4.7)[3.5.0-alpha1, 3.5.8)[3.6.0-alpha1, 3.6.4)[4.0.0-alpha1, 4.0.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-OPENSSL-19267443
- published26 Aug 2026
- disclosed25 Aug 2026
- creditBhabani Sankar Das, Filipe Casal(Trail of Bits)
Introduced: 25 Aug 2026
NewCVE-2026-63072 (opens in a new tab)How to fix?
Upgrade openssl to version 1.1.1zi, 3.0.22, 3.4.7, 3.5.8, 3.6.4, 4.0.2 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Write due to buffer sizing in cms_kek_cipher() in crypto/cms/cms_kari.c and crypto/cms/cms_kemri.c. An attacker can corrupt the heap and trigger a denial of service by supplying a crafted CMS message that is decrypted with CMS_decrypt() and causes the AES-WRAP-PAD unwrap path to write past the allocated output buffer.