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HIGH severity

CVE-2025-64500 — http-foundation

HIGHFix: symfony/symfony@9962b91

CVE-2025-64500 is a high-severity (CVSS 7.3) CWE-647 vulnerability in symfony/http-foundation. A fix is available for symfony/http-foundation — see the affected versions and patch details below.

Symfony's incorrect parsing of PATH_INFO can lead to limited authorization bypass

Also known asGHSA-3rg7-wf37-54rm
Published
Updated
Affected
6 pkgs
Patched
6 / 6
Exploits
None indexed
Exploitation data as of Oct 14, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-64500.

EPSS Exploitation Probability

via FIRST.org ↗
1.4%probability of exploitation in next 30 days
Lower Risk+0.10%
Lower risk than most CVEs72th percentile — riskier than 72% of all scored CVEsHighest risk
0.00%2.73%5.46%8.19%0.0%1.4%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2025-64500 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 388,997 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

6 pkgs affected
🐘symfony/http-foundation🐘symfony/http-foundation🐘symfony/http-foundation🐘symfony/symfony🐘symfony/symfony🐘symfony/symfony

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Symfony's HttpFoundation component defines an object-oriented layer for the HTTP specification. Starting in version 2.0.0 and prior to version 5.4.50, 6.4.29, and 7.3.7, the Request class improperly interprets some PATH_INFO in a way that leads to representing some URLs with a path that doesn't start with a /. This can allow bypassing some access control rules that are built with this /-prefix assumption. Starting in versions 5.4.50, 6.4.29, and 7.3.7, the Request class now ensures that URL paths always start with a /.

Affected Packages

6 total 6 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistsymfony/http-foundationall versions5.4.50composer require symfony/http-foundation:^5.4.50
🐘Packagistsymfony/http-foundation≥ 6.0.0&&< 6.4.296.4.29composer require symfony/http-foundation:^6.4.29
🐘Packagistsymfony/http-foundation≥ 7.0.0&&< 7.3.77.3.7composer require symfony/http-foundation:^7.3.7
🐘Packagistsymfony/symfony≥ 2.0.0&&< 5.4.505.4.50composer require symfony/symfony:^5.4.50
🐘Packagistsymfony/symfony≥ 6.0.0&&< 6.4.296.4.29composer require symfony/symfony:^6.4.29
🐘Packagistsymfony/symfony≥ 7.0.0&&< 7.3.77.3.7composer require symfony/symfony:^7.3.7

Affected Products

2 products · 6 configurations
Application
httpfoundationsensiolabs
≥ 7.0.0 && < 7.3.7
range
Application
symfonysensiolabs
≥ 7.0.0 && < 7.3.7
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for symfony/http-foundation, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update symfony/http-foundation to 5.4.50 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-64500 is resolved across your whole dependency graph.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

How to detect CVE-2025-64500

A community-maintained Nuclei template exists for this CVE. You can scan for it directly:

nuclei -id cve-2025-64500 -u https://target
Template
Symfony HttpFoundation - Access Control Bypass via PATH_INFO
Severity
high
Impact
Attackers can bypass access control rules, potentially gaining unauthorized access to restricted resources.
Remediation
Update to Symfony versions 5.4.50, 6.4.29, or 7.3.7 or later.

Template by ProjectDiscovery nuclei-templates (DhiyaneshDk), MIT licensed. View the full template. Scan only systems you are authorised to test.

Frequently Asked Questions

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Symfony's HttpFoundation component defines an object-oriented layer for the HTTP specification. Starting in version 2.0.0 and prior to version 5.4.50, 6.4.29, and 7.3.7, the `Request` class improperly interprets some `PATH_INFO` in a way that leads to representing some URLs with a path that doesn't start with a `/`. This can allow bypassing some access control rules that are built with this `/`-prefix assumption. Starting in versions 5.4.50, 6.4.29, and 7.3.7, the `Request` class now ensures that
O3 Security · Impact-Aware SCA

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CVE-2025-64500: http-foundation — Fixed in 5.4.50