🛡️ CVE-2024-50343 — symfony

🟢 CVSS 3.1 — Low ✅ No Known Exploit CWE-20 NVD
3.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Symfony has an incorrect response from Validator when input ends with \n

Description

It is possible to trick a Validator configured with a regular expression using the $ metacharacters, with an input ending with \n.

Resolution

Symfony now uses the D regex modifier to match the entire input.

The patch for this issue is available [here](https://github.com/symfony/symfony/commit/7d1032bbead9a4229b32fa6ebca32681c80cb76f) for branch 5.4.

Credits

We would like to thank Offscript for reporting the issue and Alexandre Daubois 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 low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability none.

Weakness class

CVE-2024-50343 is classified as CWE-20: Improper Input Validation. The application accepts input without checking that it has the expected form, so malformed values reach code that assumes they are well formed.

Affected software

CVE-2024-50343 is recorded against 3 packages.

  • symfony/symfony (from 7.0.0 up to 7.1.4)
  • symfony/validator (from 7.0.0 up to 7.1.4)
  • unknown

Timeline and source

Published on 6 November 2024 and last revised on 3 November 2025. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Web)
github.com (Package)
lists.debian.org (Web)
symfony.com (Web)

CVE-2024-50343 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:L/UI:N/S:U/C:L/I:N/A:N
CWE CWE-20
Public Exploit ✅ No
Source NVD
Published 2024-11-06
Updated 2026-08-12
Modified 2025-11-03
Fix URL N/A

Affected Packages

Software From version Fixed in
symfony/symfony 7.0.0 7.1.4
symfony/validator 7.0.0 7.1.4
unknown — —

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