8.7

CVE-2026-45305: sensiolabs symfony

CVSS: 8.7v4.0HighAnalyzed
AliasesUBUNTU-CVE-2026-45305DEBIAN-CVE-2026-45305CGA-4qmf-96f9-2qvw
Published 14-07-2026Last modified 15-07-2026
Open JSON

Vulnerability summary

CVE-2026-45305 is a high (CVSS 8.7) vulnerability in sensiolabs symfony. EPSS estimates a 0.68% chance of exploitation in the next 30 days, higher than 51.7% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.7/10
010
High · v4.0 (CVE.org)
EPSS score
0.68%
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-RF95-2WC7-QX99

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 5.4.52, 6.4.40, 7.4.12, and 8.0.12, Symfony\Component\Yaml\Parser::cleanup() used regular expressions with overlapping quantifiers for YAML directive, comment, and document marker cleanup, allowing crafted input to make parsing hang for an arbitrarily long time. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.

CVSS metrics

7 scores · 5 sources · 2 versions

EPSS trend

Probability

0.68%

Chance of exploitation in the next 30 days

Percentile

52%

Versus all other CVEs

30-day change

0.00 pp

From 0.68% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.68%

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

Chainguard2 products
  • zabbix-web-nginx-pgsql-fips-6.0< 6.0.45-r4
  • zabbix-web-nginx-pgsql-fips-7.0< 7.0.25-r1
Symfony2 products
  • 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
  • yaml< 5.4.52 | ≥ 6.0.0-BETA1, < 6.4.40 | ≥ 7.0.0-BETA1, < 7.4.12 | ≥ 8.0.0-BETA1, < 8.0.12
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)

5 vendors · 7 products

References

12 links
Show all 12 references