VulnerabilityPublished 12 Nov 2025Updated 15 Nov 2025

CVE-2025-64500: Http foundation · Symfony's incorrect parsing of PATH_INFO can lead to limited authorization bypass

Affects symfony/http-foundationSource GCVE Database

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Not known to be exploited · public detection template (Nuclei) · CVSS 7.3 High : upgrade to 5.4.50 soon.

Data as of 13 Nov 2026, 19:07 UTC

CVSS 3.1 base score

7.3High

How severe the flaw is on the 0–10 CVSS scale.

Patch: Available – fixed in 5.4.50, 6.4.29, 7.3.7

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: Low
Availability: Low

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 12 Nov 2025
Detectable: evidence found.
nuclei template: Symfony HttpFoundation - Access Control Bypass via PATH_INFO
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade symfony/http-foundation and symfony/symfony to 5.4.50; symfony/http-foundation and symfony/symfony to 6.4.29; symfony/http-foundation and symfony/symfony to 7.3.7.

Affected software

Product	Affected	Fixed in
Packagistsymfony/http-foundation	Affected <5.4.50	Fixed in 5.4.50
Packagistsymfony/http-foundation	Affected >=6.0.0 <6.4.29	Fixed in 6.4.29
Packagistsymfony/http-foundation	Affected >=7.0.0 <7.3.7	Fixed in 7.3.7
Packagistsymfony/symfony	Affected >=2.0.0 <5.4.50	Fixed in 5.4.50
Packagistsymfony/symfony	Affected >=6.0.0 <6.4.29	Fixed in 6.4.29
Packagistsymfony/symfony	Affected >=7.0.0 <7.3.7	Fixed in 7.3.7

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A patch is available and should be applied to upgrade symfony/http-foundation to versions 5.4.50, 6.4.29, or 7.3.7 or later. Applying this official fix resolves the issue by ensuring URL paths always start with a '/'. No additional mitigation is required beyond applying the patch.

Description

Symfony's HttpFoundation component contains a vulnerability in the Request class where incorrect parsing of PATH_INFO can cause URL paths to be represented without a leading '/'. This flaw can lead to limited authorization bypass in access control rules that assume paths start with '/'. The issue affects multiple versions of symfony/http-foundation prior to fixed releases. A patch is available that ensures URL paths always start with '/'.

Impact

An attacker can exploit this flaw to bypass some access control rules that depend on the path starting with a '/'. This can lead to limited unauthorized access, potentially exposing sensitive information or functionality. The CVSS v3.1 score is 7.3 (high), reflecting network attack vector, low complexity, no privileges required, no user interaction, and impacts on confidentiality, integrity, and availability.

Summary

The Request class in symfony/http-foundation improperly interprets certain PATH_INFO values, resulting in URL paths that do not begin with a '/'. This behavior can bypass access control mechanisms that rely on the assumption that paths start with '/'. The vulnerability is tracked as CVE-2025-64500 and affects versions prior to 5.4.50, 6.4.29, and 7.3.7. The issue has been fixed by enforcing that URL paths always start with a '/'.

CWE-647Use of Non-Canonical URL Paths for Authorization Decisions (opens in a new tab)
Variant weaknessLikelihood of exploit: High
The product defines policy namespaces and makes authorization decisions based on the assumption that a URL is canonical.
Architecture and Design
Make access control policy based on path information in canonical form, with all alternate encodings rejected (which can be accomplished by a default deny rule). Consider very restrictive regular expressions to validate that the path is in the expected form.
OWASP ASVS 4.0.3
V8.3.8 (opens in a new tab)
V13.4.2 (opens in a new tab)
V7.2.2 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 13 Nov 2026, 19:07 UTC

Public exploits and detectiona Nuclei detection template

WeaknessesCWE-647

Technical details

References

Community reviews

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