6.5

CVE-2026-45070: sensiolabs symfony CRLF Injection

CVSS: 6.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-45070DEBIAN-CVE-2026-45070CGA-6xph-ggwp-jq93
Published 14-07-2026Last modified 16-07-2026
Open JSON

Vulnerability summary

CVE-2026-45070 is a medium (CVSS 6.5) CRLF Injection vulnerability in sensiolabs symfony. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 31.7% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.39%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-7MH3-V4HG-V8QH

Timeline

  1. 14-07-2026
    PublishedVulnerability first disclosed.
  2. 16-07-2026
    Last modifiedVulnerability information updated.

Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, Symfony\Component\Mime\Header\ParameterizedHeader validates and encodes parameter values but emits parameter names verbatim, allowing a caller that derives a parameter name from untrusted input to include CRLF or other non-token bytes and inject additional headers into rendered structured mail headers such as Content-Type or Content-Disposition. This issue is reported as fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.

CVSS metrics

8 scores · 6 sources · 2 versions

EPSS trend

Probability

0.39%

Chance of exploitation in the next 30 days

Percentile

32%

Versus all other CVEs

30-day change

0.00 pp

From 0.39% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.39%

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

Chainguard3 products
  • nextcloud-server-31All versions (No fix recorded)
  • nextcloud-server-32< 32.0.11-r1
  • nextcloud-server-33< 33.0.5-r2
Symfony2 products
  • mime< 5.4.52 | ≥ 6.0.0-BETA1, < 6.4.40 | ≥ 7.0.0-BETA1, < 7.4.12 | ≥ 8.0.0-BETA1, < 8.0.12
  • symfony< 5.4.52 | ≥ 6.0.0-BETA1, < 6.4.40 | ≥ 7.0.0-BETA1, < 7.4.12 | ≥ 8.0.0-BETA1, < 8.0.12
Wolfi2 products
  • nextcloud-server-32< 32.0.11-r1
  • nextcloud-server-33< 33.0.5-r2
Debian1 product
  • symfony< 5.4.53+dfsg-0+deb12u1 | < 6.4.41+dfsg-0+deb13u1 | < 7.4.12+dfsg-1
Sensiolabs1 product
  • symfony< 5.4.52 | ≥ 6.0.0, < 6.4.40 | ≥ 7.0.0, < 7.4.12 | ≥ 8.0.0, < 8.0.12
Ubuntu1 product
  • symfonyAll versions (No fix recorded)

6 vendors · 10 products

References

12 links
Show all 12 references