CVE-2026-41677
rust-opennssl has an Out-of-bounds read in PEM password callback when returning an oversized length
9.1
CRITICAL
CVSS 3.1
EPSS 0.16%
Description
The `*_from_pem_callback` APIs did not validate the length returned by the user's callback. A password callback that returns a value larger than the buffer it was given can cause some versions of OpenSSL to over-read this buffer. OpenSSL 3.x is not affected by this.
How to fix CVE-2026-41677
To remediate CVE-2026-41677, upgrade the affected package to a fixed version below.
- —upgrade to 0.10.78 or later
- —no fix listed
Is CVE-2026-41677 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- >= 0.9.0, < 0.10.78
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U |
| osv | CVSS 3.1 | CRITICAL9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |