PT-2026-22511 · Squirrel · Squirrel

Oneafter · Published 2026-01-01 · Updated 2026-03-05 · CVE-2026-3389

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Squirrel versions up to 3.2

Description A flaw exists in Squirrel that can lead to a null pointer dereference. This issue is related to the sqstd rex newnode function within the sqstdlib/sqstdrex.cpp library. The issue can be triggered locally. The exploit has been publicly disclosed.

Recommendations Versions prior to 3.2 should be updated. As a temporary workaround, consider restricting the use of the sqstd rex newnode function until a patch is available.

Exploit

Fix

Improper Resource Release

NULL Pointer Dereference

Weakness Enumeration

CWE-404

CWE-476

Related Identifiers

CVE-2026-3389

Affected Products

Squirrel

References · 19

• 🔥 https://github.com/oneafter/0122/blob/main/i314/repro · Exploit
• https://github.com/albertodemichelis/squirrel/issues/314 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-3389 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-3389 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-3389 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-3389 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-3389 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-3389 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-3389 · Security Note
• https://vuldb.com/?submit.761315 · Note
• https://twitter.com/CVEnew/status/2028067068181180692 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2028058681707806815 · Twitter Post
• https://twitter.com/infoflowcloud/status/2028067973416493102 · Twitter Post
• https://twitter.com/cyberbivash/status/2028086024337772646 · Twitter Post
• https://vuldb.com/?ctiid.348275 · Note