CVE-2026-59857

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 99% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 5 sources updated this week
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
5.5
EG Score
5.5(medium)
EPSS
1.4%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 10, 2026

Advisory Details (2)

Auto-updated Jul 9, 2026
Patch available. Sources: github, github_commit.
github Patch Available

Out-of-bounds Write in SAL Soundfolding in Vim < 9.2.0725 · Advisory · vim/vim · GitHub

Affected: 9.2.0698; the single-byte SAL branch

https://github.com/vim/vim/security/advisories/GHSA-m3hf-xcm3-xhm2
github_commit

commit d22ff1c955ff (vim/vim)

Fix landed in vim/vim commit d22ff1c955ff — awaiting tagged release

https://github.com/vim/vim/commit/d22ff1c955ff87e8273210eae125aab0e85b6c30

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuxxd (2:9.1.2141-1ubuntu4.7) @ resolute2026-07-15ubuntu
redhatvim-main-9.2.780-1.hum12026-07-03redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 21× in last 7d / 21× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-15 20:15 UTCEG score recompute
  2. 2026-07-15 20:15 UTCVendor advisory
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 16:57 UTCEPSS rescore
  5. 2026-07-15 02:00 UTCEPSS rescore
  6. 2026-07-15 02:00 UTCEPSS rescore
  7. 2026-07-14 20:41 UTCEG score recompute
  8. 2026-07-14 20:41 UTCVendor advisory
  9. 2026-07-13 22:31 UTCEPSS rescore
  10. 2026-07-13 21:07 UTCEG score recompute
  11. 2026-07-13 06:13 UTCEPSS rescore
  12. 2026-07-13 06:13 UTCEPSS rescore
  13. 2026-07-12 21:33 UTCEG score recompute
  14. 2026-07-12 05:46 UTCEPSS rescore
  15. 2026-07-11 21:59 UTCEG score recompute
  16. 2026-07-11 08:27 UTCEPSS rescore
  17. 2026-07-11 08:27 UTCEPSS rescore
  18. 2026-07-10 22:25 UTCEG score recompute▼ 0.10
  19. 2026-07-10 20:19 UTCNVD updateCVSS v3 → 5.5
  20. 2026-07-09 22:46 UTCEG score recompute
  21. 2026-07-09 22:45 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-59857?
CVE-2026-59857 is a medium vulnerability published on July 9, 2026. Vim is an open source, command line text editor. Prior to 9.2.0725, the single-byte branch of spellsoundfoldsal() 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…
When was CVE-2026-59857 disclosed?
CVE-2026-59857 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59857 actively exploited?
CVE-2026-59857 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-59857?
CVE-2026-59857 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-59857?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59857, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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