How severe is CVE-2026-45130?

CVE-2026-45130 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability high.

Is CVE-2026-45130 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-45130?

CVE-2026-45130 primarily affects Neovim. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-45130?

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

Does CVE-2026-45130 have an EU (EUVD) identifier?

Yes. CVE-2026-45130 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28871.

When was CVE-2026-45130 published?

CVE-2026-45130 was published on 2026-05-08 and last updated on 2026-06-17.

CVE-2026-45130

CVE-2026-45130 is a medium-severity vulnerability in Neovim with a CVSS 3.x base score of 6.6. 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-122.

Key facts

Severity: Medium (CVSS 3.x base score 6.6)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28871
Weakness: CWE-122
Affected product: Neovim
Published: 2026-05-08
Last modified: 2026-06-17

Description

Vim is an open source, command line text editor. Prior to version 9.2.0450, a heap buffer overflow exists in read_compound() in src/spellfile.c when loading a crafted spell file (.spl) with UTF-8 encoding active. An attacker-controlled length field in the spell file's compound section overflows a 32-bit signed integer multiplication, causing a small buffer to be allocated for a write loop that runs many iterations, overflowing the heap. Because the 'spelllang' option can be set from a modeline, a text file modeline can trigger spell file loading if a malicious .spl file has been planted on the runtimepath. This issue has been patched in version 9.2.0450.

Frequently asked questions

What is CVE-2026-45130?: Vim is an open source, command line text editor. Prior to version 9.2.0450, a heap buffer overflow exists in read_compound() in src/spellfile.c when loading a crafted spell file (.spl) with UTF-8 encoding active. An attacker-controlled length field in the spell file's compound section overflows a 32-bit signed integer multiplication, causing a small buffer to be allocated for a write loop that runs many iterations, overflowing the heap. Because the 'spelllang' option can be set from a modeline, a text file modeline can trigger spell file loading if a malicious .spl file has been planted on the runtimepath. This issue has been patched in version 9.2.0450.
How severe is CVE-2026-45130?: CVE-2026-45130 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability high.
Is CVE-2026-45130 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-45130?: CVE-2026-45130 primarily affects Neovim. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-45130?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-45130 have an EU (EUVD) identifier?: Yes. CVE-2026-45130 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28871.
When was CVE-2026-45130 published?: CVE-2026-45130 was published on 2026-05-08 and last updated on 2026-06-17.

References

Affected products (2)

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

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