CVE-2026-45191
medium
CVSS v3
6.5
CVSS v2
—
VIR risk
6.5
Description
Net::CIDR::Lite versions before 0.24 for Perl does not properly consider extraneous zero characters in CIDR mask values, which may allow IP ACL bypass. Mask forms like "/00" and "/01" pass validation and parse to the same prefix as their unpadded value. See also CVE-2026-45190.
Predictions
Exploit likelihood
75%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-45191.html
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-45191
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | fixed | 0.24-1 |
| debian | sid | fixed | 0.24-1 |
| debian | trixie | affected | |
| sles | affected | |
References
- https://github.com/stigtsp/Net-CIDR-Lite/commit/24e2c439ec405e5256024b9acefd4f7008c5ed0c.patch
- https://metacpan.org/release/STIGTSP/Net-CIDR-Lite-0.24/changes
- https://www.cve.org/CVERecord?id=CVE-2026-45190
- https://security-tracker.debian.org/tracker/CVE-2026-45191
- https://www.suse.com/security/cve/CVE-2026-45191.html
CWEs
CWE-1289
Verify integrity in audit chain (admin only). AS-IS.