CVE-2026-23893: openCryptoki is a PKCS#11 library and provides tooling for Linux and AIX

Routine

MEDIUM 6.8WATCHLISTDOWNGRADE

CVE-2026-23893 is a medium-severity flaw (CVSS 6.8) affecting opencryptoki. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

openCryptoki is a PKCS#11 library and provides tooling for Linux and AIX. Versions 2.3.2 and above are vulnerable to symlink-following when running in privileged contexts. A token-group user can redirect file operations to arbitrary filesystem targets by planting symlinks in group-writable token directories, resulting in privilege escalation or data exposure. Token and lock directories are 0770 (group-writable for token users), so any token-group

Why this priority

On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-59
Published	2026-01-22
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: opencryptoki project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-22 01:15 UTCPublished CVE record published
2026-06-17 10:22 UTCUpdated Record last modified

opencryptoki project opencryptoki DOWNGRADE

Affected: >= 2.3.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3.2

1. Check installed version

apt-cache policy opencryptoki || rpm -q opencryptoki || opencryptoki --version

2. No fixed release: DOWNGRADE to a release before 2.3.2 (Debian / Ubuntu)

apt-cache madison opencryptoki sudo apt install opencryptoki=<VERSION_BEFORE_2.3.2> sudo apt-mark hold opencryptoki

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list opencryptoki sudo dnf downgrade opencryptoki-<VERSION_BEFORE_2.3.2> sudo dnf versionlock add opencryptoki

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-23893?

opencryptoki: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-23893 being exploited?

CVE-2026-23893 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-23893 affect?

CVE-2026-23893 affects opencryptoki. Severity is medium (CVSS 6.8). openCryptoki is a PKCS#11 library and provides tooling for Linux and AIX. Versions 2.3.2 and above are vulnerable to symlink-following when running in privileged contexts. A token-group user can redirect file operations to arbitrary filesys

How urgent is CVE-2026-23893?

Priority 31/100. On your watchlist

Related CVEs

CVE-2026-40253 MEDIUM 6.8 UPGRADE openCryptoki is a PKCS#11 library and provides tooling for Linux and AIX

References

← Back to latest CVEs