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TI-2026-76748 Aliases CVE-2026-112177GHSA-4hx3-pq6p-jhg6

Ghostscript -dSAFER bypass in Red Hat Enterprise Linux 8

Priority LOW 38CWE-648Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

Ghostscript as shipped with Red Hat Enterprise Linux 8 leaves privileged .forceput operations in .charkeys insufficiently protected, since a fix was omitted in the 9.25 to 9.27 rebase (CWE-648). A crafted PostScript file may let an unauthenticated remote attacker bypass -dSAFER, reaching files outside permitted paths or running commands with the permissions of the Ghostscript process.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

A flaw was found in Ghostscript as shipped with Red Hat Enterprise Linux 8. The correction for CVE-2019-14869 was omitted during the rebase from version 9.25 to 9.27, leaving privileged .forceput operations in the .charkeys procedure insufficiently protected. Processing a specially crafted PostScript file may allow an attacker to bypass -dSAFER restrictions and access files outside the permitted paths or execute commands with the permissions of the Ghostscript process.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0036 29th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat Enterprise Linux 8—9.27-20.el8_10Patch availableCNA
Red HatRed Hat Enterprise Linux 10——Not affectedCNA
Red HatRed Hat Enterprise Linux 6——Not affectedCNA
Red HatRed Hat Enterprise Linux 7——Not affectedCNA
Red HatRed Hat Enterprise Linux 9——Not affectedCNA
  • Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 9.27-20.el8_10 Patch available CNA
  • Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — Not affected CNA

CPE names CNA · 6

CPEVersionsRoleVendor
cpe:/a:redhat:enterprise_linux:8::appstream8—Red Hat
cpe:/a:redhat:enterprise_linux:8::crb8—Red Hat
cpe:/a:redhat:enterprise_linux:1010—Red Hat
cpe:/o:redhat:rhel_els:66—Red Hat
cpe:/o:redhat:rhel_els:77—Red Hat
cpe:/a:redhat:enterprise_linux:99—Red Hat
  • cpe:/a:redhat:enterprise_linux:8::appstream Versions 8 — ·Red Hat
  • cpe:/a:redhat:enterprise_linux:8::crb Versions 8 — ·Red Hat
  • cpe:/a:redhat:enterprise_linux:10 Versions 10 — ·Red Hat
  • cpe:/o:redhat:rhel_els:6 Versions 6 — ·Red Hat
  • cpe:/o:redhat:rhel_els:7 Versions 7 — ·Red Hat
  • cpe:/a:redhat:enterprise_linux:9 Versions 9 — ·Red Hat

Remediation

Red Hat Enterprise Linux 8 is fixed in version 9.27-20.el8_10 by RHSA-2026:93978. The sources list Red Hat Enterprise Linux 6, 7, 9 and 10 as not affected.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Red Hat 1 advisory

  • RHSA-2026:93978 Released 2026-11-02 · Red Hat rating Important
    ghostscript security update
    • Red Hat Enterprise Linux AppStream (v. 8) ghostscript-9.27-20.el8_10

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:93978
Not affected: 6 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux AppStream (v. 8)
  • Red Hat Enterprise Linux CRB (v. 8)

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-112177
  2. 2026-10-20 Alias added: GHSA-4hx3-pq6p-jhg6
  3. 2026-10-20 Affected versions changed · Red Hat
  4. 2026-10-20 CVSS score added · Red Hat
  5. 2026-10-20 CISA SSVC decision points changed
  6. 2026-10-20 Priority changed: MEDIUM → LOW
  7. 2026-11-02 Fix available: Red Hat Enterprise Linux AppStream (v. 8) · Red Hat
  8. 2026-11-02 Fix available: ghostscript@0:9.27-20.el8_10 · CNA
  9. 2026-11-02 1 new reference · CNA
  10. 2026-11-03 Fix available: RHSA-2026:93978 · Red Hat

References

Advisory 1

Other 3

  • TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
See all 7413 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences