CVE-2018-7186

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

Leptonica before 1.75.3 does not limit the number of characters in a %s format argument to fscanf or sscanf, which allows remote attackers to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact via a long string, as demonstrated by the gplotRead and ptaReadStream functions.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation3% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
3%
EPSS %ILE
88%
KEV
Not listed

Published

February 16, 2018

Last Modified

November 21, 2024

Advisory Details (5)

Auto-updated Sep 2, 2026
Patch available. Sources: github_commit.
generic

Leptonica: Multiple Vulnerabilities (GLSA 202312-01) — Gentoo security

https://security.gentoo.org/glsa/202312-01
generic

Re: upload leptonlib

https://lists.debian.org/debian-lts/2018/02/msg00054.html
generic Patch Available

[SECURITY] [DLA 1302-1] leptonlib security update

https://lists.debian.org/debian-lts-announce/2018/03/msg00005.html
github_commit Patch Available

commit ee301cb2029d (DanBloomberg/leptonica)

Patch available: DanBloomberg/leptonica 1.75.3 (contains commit ee301cb2029d)

https://github.com/DanBloomberg/leptonica/commit/ee301cb2029db8a6289c5295daa42bba7715e99a
generic Patch Available

#890548 - leptonlib: CVE-2018-7186: Stack buffer overflows - Debian Bug report logs

https://bugs.debian.org/890548

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuliblept5 (1.73-1ubuntu0.1~esm1) @ xenial2026-05-28ubuntu

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.

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
leptonlib—1.75.3-2—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
leptonlib—1.75.3-2—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
leptonlib—1.75.3-2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
leptonlib—1.75.3-2—
Debian:7(1)
PackageVulnerable rangeFixed inDependents
leptonlib1.69-3.1, 1.69-3.1+deb7u11.69-3.1+deb7u2—

Weakness Classification(1)

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

All Vendor Advisories

(1)

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 4× in last 7d / 24× 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.

Showing the most recent 100 of 139 total refreshes for this CVE.

  1. 2026-09-06 13:44 UTCEPSS rescore
  2. 2026-09-04 13:56 UTCEPSS rescore
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  1. 2026-08-07 16:23 UTCEPSS rescore
  2. 2026-08-07 01:39 UTCOSV refresh
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  20. 2026-07-23 01:37 UTCEG score recompute
  21. 2026-07-22 22:17 UTCEG score recompute
  22. 2026-07-22 14:05 UTCEPSS rescore
  23. 2026-07-21 17:18 UTCOSV refresh
  24. 2026-07-21 15:22 UTCEPSS rescore
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  47. 2026-07-04 12:56 UTCOSV refresh
  48. 2026-07-04 06:28 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2018-7186?
CVE-2018-7186 is a critical vulnerability published on February 16, 2018. Leptonica before 1.75.3 does not limit the number of characters in a %s format argument to fscanf or sscanf, which allows remote attackers to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact via a long string, as demonstrated by the gplotRead and…
When was CVE-2018-7186 disclosed?
CVE-2018-7186 was first published in the National Vulnerability Database on February 16, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-7186 actively exploited?
CVE-2018-7186 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 11.9% of all scored CVEs.
What is the CVSS score of CVE-2018-7186?
CVE-2018-7186 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2018-7186?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-7186, 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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