# CVE-2026-56968 — GNU SASL

> As of 2026-06-23, CVE-2026-56968 is a LOW-severity vulnerability in GNU SASL, CVSS v3.1 3.7, EPSS 0.2% (13.7th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-56968 as of 2026-06-23; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-06-23

## What is CVE-2026-56968?

GNU SASL before 2.2.4 lacks sanitization of a short challenge in _gsasl_ntlm_client_step in the NTLM client, which could result in memory disclosure via a crafted server.

The record classifies CVE-2026-56968 under weakness class [CWE-839](https://cwe.mitre.org/data/definitions/839.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 104 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 3.7 — LOW (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 13.7% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-06-23

## Is CVE-2026-56968 being exploited?

It currently carries a trending score of 33 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [GNU](https://intel.threadlinqs.com/vendors/gnu): SASL

## How to fix CVE-2026-56968

No vendor patch reference has been recorded for CVE-2026-56968 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-56968

No threat campaign in the Threadlinqs corpus currently references CVE-2026-56968, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-06-25. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [lists.gnu.org](https://lists.gnu.org/archive/html/help-gsasl/2026-06/msg00000.html)
- [lists.debian.org](https://lists.debian.org/debian-security-announce/2026/msg00259.html)
- [ftp.gnu.org](https://ftp.gnu.org/gnu/gsasl/)
- [gnu.org](https://www.gnu.org/software/gsasl/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-56968
Full detection coverage and IOCs for threats exploiting CVE-2026-56968 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp