CVE-2023-50251: php-svg-lib is an SVG file parsing / rendering library

Q: How do I fix CVE-2023-50251?

php-svg-lib: upgrade to 0.5.1. Exact commands for each OS are on this page.

Q: Is CVE-2023-50251 being exploited?

CVE-2023-50251 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-50251 affect?

CVE-2023-50251 affects php-svg-lib. Severity is medium (CVSS 5.3). php-svg-lib is an SVG file parsing / rendering library. Prior to version 0.5.1, when parsing the attributes passed to a `use` tag inside an svg document, an attacker can cause the system to go to an infinite recursion. Depending on the syst

Q: How urgent is CVE-2023-50251?

Priority 43/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2023-50251 is a medium-severity flaw (CVSS 5.3) affecting php-svg-lib. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

php-svg-lib is an SVG file parsing / rendering library. Prior to version 0.5.1, when parsing the attributes passed to a `use` tag inside an svg document, an attacker can cause the system to go to an infinite recursion. Depending on the system configuration and attack pattern this could exhaust the memory available to the executing process and/or to the server itself. An attacker sending multiple request to a system to render the above payload can

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-674
Published	2023-12-12
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: dompdf

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-12-12 21:15 UTCPublished CVE record published
2026-06-17 06:39 UTCUpdated Record last modified

dompdf php-svg-lib UPGRADE

Affected: < 0.5.1

Fixed in: 0.5.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy php-svg-lib || rpm -q php-svg-lib || php-svg-lib --version

2. UPGRADE to 0.5.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade php-svg-lib

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade php-svg-lib

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-50251?

php-svg-lib: upgrade to 0.5.1. Exact commands for each OS are on this page.

Is CVE-2023-50251 being exploited?

CVE-2023-50251 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-50251 affect?

CVE-2023-50251 affects php-svg-lib. Severity is medium (CVSS 5.3). php-svg-lib is an SVG file parsing / rendering library. Prior to version 0.5.1, when parsing the attributes passed to a `use` tag inside an svg document, an attacker can cause the system to go to an infinite recursion. Depending on the syst

How urgent is CVE-2023-50251?

Priority 43/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2024-25117 MEDIUM 6.8 UPGRADE php-svg-lib is a scalable vector graphics (SVG) file parsing/rendering library
CVE-2023-50252 HIGH 8.3 UPGRADE php-svg-lib is an SVG file parsing / rendering library

References

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