CVE-2018-18284

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 16%CVSS: 8.6Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Artifex Ghostscript 9.25 and earlier allows attackers to bypass a sandbox protection mechanism via vectors involving the 1Policy operator.

CVSS v3
8.6
EG Score
8.6HIGHmedium confidence
EG Risk
59
EG Risk 59/100CISA SSVC

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
Severity86% × 45%
Exploitation40% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
16%
EPSS %ILE
96th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (EG-KEV: elevated) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

October 19, 2018

Last Modified

November 21, 2024

Advisory Details (8)

Auto-updated Sep 1, 2026
Patch available. Sources: redhat.
generic

myF5

https://support.f5.com/csp/article/K22141757?utm_source=f5support&amp%3Butm_medium=RSS
generic

GPL Ghostscript: Multiple vulnerabilities (GLSA 201811-12) — Gentoo security

https://security.gentoo.org/glsa/201811-12
genericMentions a patch (unverified)

[SECURITY] [DLA 1552-1] ghostscript security update

https://lists.debian.org/debian-lts-announce/2018/10/msg00013.html
generic

699963 – 1Policy is a dangerous operator, any callers should be odef

https://bugs.ghostscript.com/show_bug.cgi?id=699963
generic
https://bugs.chromium.org/p/project-zero/issues/detail?id=1696
redhatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2018:3834
generic

CVE-2018-18284 - PSIRT.COM

http://www.securityfocus.com/bid/107451
generic

oss-security - ghostscript: 1Policy operator gives access to .forceput CVE-2018-18284

http://www.openwall.com/lists/oss-security/2018/10/16/2

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibgs9-common (9.25~dfsg+1-0ubuntu0.16.04.2) @ xenial2026-05-28ubuntu
redhatghostscript-0:9.07-31.el7_6.62018-12-17redhat

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

(25 across 25 ecosystems)
Alpine:v3.10(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.11(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.12(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.13(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.14(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.15(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.16(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.17(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.18(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.19(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.5(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (37 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.6(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (38 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.7(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.8(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Alpine:v3.9(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript8.64-r0 ... 9.25-r0 (39 versions)
  • every version up to 9.25-r1: fixed in 9.25-r1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript—
  • every version up to 9.25~dfsg-3: fixed in 9.25~dfsg-3
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript—
  • every version up to 9.25~dfsg-3: fixed in 9.25~dfsg-3
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript—
  • every version up to 9.25~dfsg-3: fixed in 9.25~dfsg-3
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript—
  • every version up to 9.25~dfsg-3: fixed in 9.25~dfsg-3
—
Debian:8(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript9.06~dfsg-2 ... 9.06~dfsg-2+deb8u9 (11 versions)
  • every version up to 9.06~dfsg-2+deb8u11: fixed in 9.06~dfsg-2+deb8u11
—
Debian:9(1)
PackageVulnerable rangeFix by version rangeDependents
ghostscript9.20~dfsg-3.2 ... 9.24~~rc2~dfsg-1 (15 versions)
  • every version up to 9.25~dfsg-0+deb9u1: fixed in 9.25~dfsg-0+deb9u1
—

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 5× 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.

Showing the most recent 100 of 155 total refreshes for this CVE.

  1. 2026-10-05 17:39 UTCEPSS rescore
  2. 2026-10-03 14:21 UTCEPSS rescore
  3. 2026-10-01 19:44 UTCEPSS rescore
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  6. 2026-09-28 17:42 UTCOSV refresh
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  1. 2026-09-01 13:49 UTCEPSS rescore
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  7. 2026-08-22 07:37 UTCOSV refresh
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  20. 2026-08-06 10:40 UTCOSV refresh
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  33. 2026-07-23 01:34 UTCEG score recompute
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  37. 2026-07-21 03:47 UTCOSV refresh
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  60. 2026-07-02 16:54 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2018-18284?
CVE-2018-18284 is a high vulnerability published on October 19, 2018. Artifex Ghostscript 9.25 and earlier allows attackers to bypass a sandbox protection mechanism via vectors involving the 1Policy operator.
When was CVE-2018-18284 disclosed?
CVE-2018-18284 was first published on October 19, 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-2018-18284 actively exploited?
CVE-2018-18284 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16% probability of exploitation in the next 30 days (96th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2018-18284?
CVE-2018-18284 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2018-18284?
A fix for CVE-2018-18284 is available: update to the fixed version the vendor names in its advisory.

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