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🛡️ CVE-2024-50345 — symfony

🟢 CVSS 3.1 — Low ✅ No Known Exploit CWE-601 NVD
3.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Symfony vulnerable to open redirect via browser-sanitized URLs

Description

The Request class, does not parse URI with special characters the same way browsers do. As a result, an attacker can trick a validator relying on the Request class to redirect users to another domain.

Resolution

The Request::create methods now assert the URI does not contain invalid characters as defined by https://url.spec.whatwg.org/

The patch for this issue is available [here](https://github.com/symfony/symfony/commit/5a9b08e5740af795854b1b639b7d45b9cbfe8819) for branch 5.4.

Credits

We would like to thank Sam Mush - IPASSLab && ZGC Lab for reporting the issue and Nicolas Grekas for providing the fix.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: Required — someone has to click, open or visit something.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
  • Integrity impact: None.
  • Availability impact: None.

Weakness class

CVE-2024-50345 is classified as CWE-601: Open Redirect. A redirect target is taken from user input, so a trusted link can send the visitor to an attacker's site.

Affected software

CVE-2024-50345 is recorded against 2 packages.

  • symfony (from 7.0.0 up to 7.1.7)
  • symfony/http-foundation (from 7.0.0 up to 7.1.7)

Timeline and source

Published on 6 November 2024 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com
url.spec.whatwg.org
lists.debian.org

Other advisories for this package

symfony has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-601: Open Redirect) in other software:

CVE-2024-50345 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity LOW
CVSS Score 3.1
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
CWE CWE-601
Public Exploit ✅ No
Source NVD
Published 2024-11-06
Updated 2026-08-20
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
symfony 7.0.0 7.1.7
symfony/http-foundation 7.0.0 7.1.7

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