6.1

CVE-2026-48784: sensiolabs symfony Encoding Error

CVSS: 6.1v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-48784DEBIAN-CVE-2026-48784CGA-69j8-g5jf-w598
Published 14-07-2026Last modified 15-07-2026
Open JSON

Vulnerability summary

CVE-2026-48784 is a medium (CVSS 6.1) Encoding Error vulnerability in sensiolabs symfony. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 26.9% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
6.1/10
010
Medium · v3.1 (NVD)
EPSS score
0.35%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 14-07-2026
    PublishedVulnerability first disclosed.
  2. 15-07-2026
    Last modifiedVulnerability information updated.

Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.53, 6.4.41, 7.4.13, and 8.0.13, UrlGenerator::doGenerate() used strtr() dot-segment encoding that skipped every other chained ../ or ./ segment, allowing attacker-controlled route parameters to generate URLs that collapse to a different path under RFC 3986 normalization. This issue is fixed in versions 5.4.53, 6.4.41, 7.4.13, and 8.0.13.

CVSS metrics

7 scores · 5 sources · 2 versions

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

0.00 pp

From 0.35% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.35%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Symfony2 products
  • routing< 5.4.53 | ≥ 6.0.0-BETA1, < 6.4.41 | ≥ 7.0.0-BETA1, < 7.4.13 | ≥ 8.0.0-BETA1, < 8.0.13
  • symfony< 5.4.53 | ≥ 6.0.0-BETA1, < 6.4.41 | ≥ 7.0.0-BETA1, < 7.4.13 | ≥ 8.0.0-BETA1, < 8.0.13
Chainguard1 product
  • nextcloud-server-31All versions (No fix recorded)
Debian1 product
  • symfony< 5.4.53+dfsg-0+deb12u1 | < 6.4.41+dfsg-0+deb13u1 | < 7.4.13+dfsg-1
Sensiolabs1 product
  • symfony< 5.4.53 | ≥ 6.0.0, < 6.4.41 | ≥ 7.0.0, < 7.4.13 | ≥ 8.0.0, < 8.0.13
Ubuntu1 product
  • symfonyAll versions (No fix recorded)

5 vendors · 6 products

References

11 links
Show all 11 references