CVE-2026-41681: Openssl · Buffer overflow in `MdCtxRef::digest_final`
Affects opensslSource GCVE Database
Not known to be exploited : upgrade to 0.10.78 soon.
Data as of 10 Nov 2026, 14:22 UTC
Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
- Patch
- Available – fixed in 0.10.78
Exploitation evidence
Disclosed: evidence found.
CVE published 19 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.
What to do
Upgrade openssl to 0.10.78.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
crates.ioopensslpkg:cargo/opensslOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade OpenSSL to version 0.10.78 or later, where the vulnerability is fixed by checking the output slice length before calling EVP_DigestFinal. Applying this official fix fully mitigates the issue.
Description
A buffer overflow vulnerability exists in OpenSSL's MdCtxRef::digest_final function where the output buffer length is not checked before calling EVP_DigestFinal. This causes an overrun if the output slice is shorter than the digest size, potentially corrupting the stack. The issue affects versions from 0.10.39 up to but not including 0.10.78. The vulnerability was fixed in version 0.10.78 by adding a length check that returns an error if the output slice is too short.