Detections
Analytics

SCA: security update for dompdf/dompdf (GHSA-7x2p-4jvh-6384)

low Tenable Cloud Security Plugin ID 445195

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Dompdf is an HTML to PDF converter for PHP. Versions 3.15 and prior are vulnerable to a File Existence
 Oracle attack through the manipulation of the CSS @font-face directive. By providing malicious HTML that
 references local files via the file:// protocol repeatedly, an attacker can trigger PHP memory exhaustion.
 Because Dompdf behaves differently depending on whether a referenced local file exists (an existing file
 is processed repeatedly until it triggers an "Allowed memory size exhausted" crash, whereas a missing file
 fails fast or is ignored and never hits the memory limit), an attacker can use this observable discrepancy
 as an oracle to enumerate sensitive files on the server regardless of CHROOT restrictions. Exploitation
 requires the attacker to supply unrestricted or unsanitized HTML in a request that permits large data,
 plus a configuration where Dompdf's memory limit is low enough to be exhausted (with
 $_dompdf_show_warnings=true making the overflow easier to reach). This issue has been fixed in version
 3.16. (CVE-2026-55555)

Solution

Update the dompdf/dompdf library and its related packages to version 3.1.6 or later.

See Also

https://github.com/advisories/GHSA-7x2p-4jvh-6384

Plugin Details

Severity: Low

ID: 445195

Version: Revision 1.4

Type: Local

Family: SCA Checks

Published: 7/23/2026

Updated: 8/6/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.75

Vendor

Vendor Severity: Low

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N

CVSS Score Source: CVE-2026-55555

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: Low

Base Score: 2.3

Threat Score: 1.3

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/22/2026

Vulnerability Publication Date: 7/22/2026

Reference Information

CVE: CVE-2026-55555

cwe: CWE-203