How severe is CVE-2026-26269?

CVE-2026-26269 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability low.

Is CVE-2026-26269 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26269?

CVE-2026-26269 affects Vim. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26269?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-26269 have an EU (EUVD) identifier?

Yes. CVE-2026-26269 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7369.

When was CVE-2026-26269 published?

CVE-2026-26269 was published on 2026-02-13 and last updated on 2026-06-17.

CVE-2026-26269

CVE-2026-26269 is a medium-severity vulnerability in Vim with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-121.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7369
Weakness: CWE-121
Affected product: Vim
Published: 2026-02-13
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-26269?: 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.
How severe is CVE-2026-26269?: CVE-2026-26269 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability low.
Is CVE-2026-26269 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26269?: CVE-2026-26269 affects Vim. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26269?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-26269 have an EU (EUVD) identifier?: Yes. CVE-2026-26269 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7369.
When was CVE-2026-26269 published?: CVE-2026-26269 was published on 2026-02-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:vim:vim:*:*:*:*:*:*:*:*

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