TI-2026-09955 Aliases CVE-2026-11526 GHSA-hx22-9fx3-xg77

OS command injection in RURBAN GD

MEDIUM 52CWE-73Published 2026-06-14 · Updated 2026-06-21

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Partial Red Hat: 1 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-78.

Summary

GD versions before 2.86 for Perl allow OS command injection and file overwrite via a 2-arg open() of filename arguments in _make_filehandle. GD::Image::_make_filehandle opens a filename argument with Perl's 2-arg open(), so a filename that begins or ends with a pipe ("| cmd", "cmd |") or begins with a redirect ("> path", ">> path") is run as a command or redirect rather than opened as a file. _make_filehandle is the single open path behind every filename-accepting constructor (new, newFromPng, newFromJpeg, and the rest); the in-memory *Data variants do not open a path and are unaffected. Any caller that forwards untrusted input to one of these constructors as a pathname can run an arbitrary command or truncate a file under the process UID.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01353 71st percentileScored 2026-11-07

Fix Partial GD (RURBAN): 2.86Red Hat: 1 advisoryRed Hat: 1 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
RURBAN	GD	before 2.86	2.86	Patch available	CNA

GD VendorRURBAN Affected before 2.86 Fixed in 2.86 Patch available CNA

Remediation

Fix · CNA GD (RURBAN) Fixed in 2.86

Red Hat 1 advisory

RHSA-2026:49758 Released 2026-08-03 · Red Hat rating Critical
perl-GD security update
- Red Hat Enterprise Linux Server (v. 7 ELS) perl-GD-2.49-3.el7_9.1

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux Server (v. 7 ELS)	Fixed	RHSA-2026:49758

Timeline

2026-10-02 Threatist record created from CVE-2026-11526
2026-10-03 Alias added: GHSA-hx22-9fx3-xg77

References

Patch 1

https://github.com/lstein/Perl-GD/commit/67b163713c6c78dfeb693da0978ae934e5cd8210.patch

Other 1

https://metacpan.org/release/RURBAN/GD-2.86/changes

TI-2022-24155 The Cpanel::JSON::XS package before 4.33 for Perl performs out-of-bounds accesses in a… CVSS 3.1CRITICAL 9.1
TI-2026-08360 Improper handling of exceptional conditions in RURBAN Cpanel::JSON::XS CVSS 3.1HIGH 7.5
TI-2026-08187 Type confusion in RURBAN Cpanel::JSON::XS CVSS 3.1HIGH 7.3
TI-2025-27320 Heap-based buffer overflow in RURBAN Cpanel::JSON::XS CVSS 3.1MEDIUM 5.6

Sources

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