Is CVE-2026-26269 in the CISA KEV catalog?

No. CVE-2026-26269 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-26269?

CVE-2026-26269 has a CVSS v3 base score of 5.4 (MEDIUM).

What is the EPSS score for CVE-2026-26269?

CVE-2026-26269 has an EPSS score of 0.28% (20th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-26269?

Upgrade vim on debian unstable to 2:9.2.0119-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2026-26269

MEDIUM

5.4

CVSS v3

NVD

Description

Vim is an open source, command line text editor. Prior to 9.1.2148, a stack buffer overflow vulnerability exists in Vim's NetBeans integration when processing the specialKeys command, affecting Vim builds that enable and use the NetBeans feature. The Stack buffer overflow exists in special_keys() (in src/netbeans.c). The while (*tok) loop writes two bytes per iteration into a 64-byte stack buffer (keybuf) with no bounds check. A malicious NetBeans server can overflow keybuf with a single specialKeys command. The issue has been fixed as of Vim patch v9.1.2148.

CWE-121Stack-based Buffer Overflow

How to fix

Remediation Available

vimDebian

Fixed in:2:9.2.0119-1CVE-2026-26269

vimUbuntu

Fixed in:2:7.4.052-1ubuntu3.1+esm23USN-8101-1

Fixed in:2:7.4.1689-3ubuntu1.5+esm29USN-8101-1

Fixed in:2:8.0.1453-1ubuntu1.13+esm14USN-8101-1

Fixed in:2:8.1.2269-1ubuntu5.32+esm2USN-8101-1

Fixed in:2:8.2.3995-1ubuntu2.26USN-8101-1

Fixed in:2:9.1.0016-1ubuntu7.10USN-8101-1

Fixed in:2:9.1.0967-1ubuntu6.1USN-8101-1

VimWindows application

Affected:9.1.2148Fixed in:9.1.2148Bram Moolenaar et al.

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

Exploit Intelligence

0.28%probability of exploitation in 30 days

20thpercentile

Low risk: more likely to be exploited than 20% of all known CVEs.

References

Patch3

Release Notes1

github.com

Related Vulnerabilities

Other CWE-121 (Stack-based Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2009-0927	High	8.8	97%	KEV	Fix
CVE-2020-10924	High	8.8	87%	-	-
CVE-2022-20705	Critical	10.0	80%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-02-18.