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Fencer Vulns
low 3.1

CVE-2024-50343 json

Incorrect response from Validator when input ends with `\n` in symfony/validator

published 2024-11-06 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-3249 , GHSA-g3rh-rrhp-jhh9

cvss
3.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 39%
public exploits
0
none known

Summary

symfony/validator is a module for the Symphony PHP framework which provides tools to validate values. It is possible to trick a `Validator` configured with a regular expression using the `$` metacharacters, with an input ending with `\n`. Symfony as of versions 5.4.43, 6.4.11, and 7.1.4 now uses the `D` regex modifier to match the entire input. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Patch / fix

  • packagist symfony/symfony 5.4.43, 6.4.11, 7.1.4
  • packagist symfony/validator 5.4.43, 6.4.11, 7.1.4
  • sensiolabs symfony 5.4.43, 6.4.11, 7.1.4
  • symfony Debian 12 5.4.23+dfsg-1+deb12u3
  • symfony Debian 14, Debian 13 6.4.11+dfsg-1

debian advisories DEBIAN-CVE-2024-50343

  • symfony Ubuntu Pro 20.04 LTS 4.3.8+dfsg-1ubuntu1+esm2
  • symfony Ubuntu Pro 22.04 LTS 5.4.4+dfsg-1ubuntu8+esm1
  • symfony Ubuntu Pro 24.04 LTS 6.4.5+dfsg-3ubuntu3+esm1

ubuntu advisories UBUNTU-CVE-2024-50343

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
GitHub 3.1 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
packagist symfony/symfony
<5.4.43
>=6.0.0, <6.4.11
>=7.0.0, <7.1.4
5.4.43
6.4.11
7.1.4
packagist symfony/validator
<5.4.43
>=6.0.0, <6.4.11
>=7.0.0, <7.1.4
5.4.43
6.4.11
7.1.4

Affected products

  • symfony symfony

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.