CVE-2023-26267: php-saml-sp before 1.1.1 and 2.x before 2.1.1 allows reading arbitrary files as the webserver user because res

Routine

MEDIUM 6.5UPGRADE

CVE-2023-26267 is a medium-severity flaw (CVSS 6.5) affecting php-saml-sp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

php-saml-sp before 1.1.1 and 2.x before 2.1.1 allows reading arbitrary files as the webserver user because resolving XML external entities was silently enabled via \LIBXML_DTDLOAD | \LIBXML_DTDATTR.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-611
Published	2023-02-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: php-saml-sp project

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

Am I affected?

Timeline

2023-02-21 09:15 UTCPublished CVE record published
2026-06-17 05:42 UTCUpdated Record last modified

php-saml-sp project php-saml-sp UPGRADE

Affected: < 1.1.1 · >= 2.0.0 and < 2.1.1

Fixed in: 1.1.1, 2.1.1

Safe to downgrade to: a release before 2.0.0

1. Check installed version

apt-cache policy php-saml-sp || rpm -q php-saml-sp || php-saml-sp --version

2. UPGRADE to 1.1.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade php-saml-sp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade php-saml-sp

Note

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

3. If no update is available yet, DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)

apt-cache madison php-saml-sp sudo apt install php-saml-sp=<VERSION_BEFORE_2.0.0> sudo apt-mark hold php-saml-sp

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list php-saml-sp sudo dnf downgrade php-saml-sp-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add php-saml-sp

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2023-26267?

php-saml-sp: upgrade to 1.1.1, 2.1.1. Exact commands for each OS are on this page.

Is CVE-2023-26267 being exploited?

CVE-2023-26267 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-2023-26267 affect?

CVE-2023-26267 affects php-saml-sp. Severity is medium (CVSS 6.5). php-saml-sp before 1.1.1 and 2.x before 2.1.1 allows reading arbitrary files as the webserver user because resolving XML external entities was silently enabled via \LIBXML_DTDLOAD | \LIBXML_DTDATTR.

How urgent is CVE-2023-26267?

Priority 34/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

References

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