CVE-2026-59857: Vim is an open source, command line text editor. Prior to 9.2.0725, the single-byte branch of spell_soundfold_sal() in src/spell.c translates a word through a spell file's SAL soun

mediumCVSS 5.5CVE-2026-59857

Vim is an open source, command line text editor. Prior to 9.2.0725, the single-byte branch of spell_soundfold_sal() in src/spell.c translates a word through a spell file's SAL sound-folding rules into a caller-owned result buffer, but its result writes are guarded with reslen < MAXWLEN, allowing reslen to reach MAXWLEN before res[reslen] = NUL writes one byte past the end of the MAXWLEN-element stack buffer. A boundary-length word passed to soundfold(), or reached via sound-based spell suggestion while a SAL-based spell language is active under a non-multibyte 8-bit encoding, can corrupt the eval_soundfold() stack frame and crash the editor. This issue is fixed in version 9.2.0725.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 5.5
Published: 2026-07-09
Last updated: 2026-07-10
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-59857

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-598570.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-59857	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[UPDATE] [medium] vim: Vulnerability allows Denial of Servicecert-bund

Recent advisories for Vim is an

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

medium[UPDATE] [medium] vim: Multiple vulnerabilities allow code executioncert-bund · 2026-07-10
medium[UPDATE] [medium] vim: Vulnerability allows Denial of Servicecert-bund · 2026-07-10
highCVE-2026-59858: Vim is an open source, command line text editor. Prior to 9.2.0735, the C omni-completion scri…nvd · 2026-07-09
highCVE-2026-59856: Vim is an open source, command line text editor. Prior to 9.2.0736, the PHP omni-completion sc…nvd · 2026-07-09
high[UPDATE] [high] vim: Vulnerability allows code executioncert-bund · 2026-07-07
medium[UPDATE] [medium] vim: Multiple vulnerabilitiescert-bund · 2026-07-03