6.9

CVE-2026-45755: /mailtrap-mailer mailtrap-mailer

CVSS: 6.9v4.0MediumAnalyzed
AliasesUBUNTU-CVE-2026-45755DEBIAN-CVE-2026-45755
Published 14-07-2026Last modified 14-07-2026
Open JSON

Vulnerability summary

CVE-2026-45755 is a medium (CVSS 6.9) vulnerability in /mailtrap-mailer mailtrap-mailer. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 17.8% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.9/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.27%
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. 14-07-2026
    Last modifiedVulnerability information updated.

Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 7.4.12 and 8.0.12, MailtrapRequestParser::doParse() received the configured webhook secret but ignored the X-Mt-Signature HMAC header, allowing unauthenticated POST requests to inject forged Mailtrap delivery, bounce, open, click, or spam events. This issue is fixed in versions 7.4.12 and 8.0.12.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

18%

Versus all other CVEs

30-day change

0.00 pp

From 0.27% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.27%

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

/mailtrap-mailer1 product
Debian1 product
  • symfony< 7.4.12+dfsg-1
Sensiolabs1 product
  • symfony≥ 7.2.0, < 7.4.12 | ≥ 8.0.0, < 8.0.12
Symfony1 product
  • symfony≥ 7.2.0, < 7.4.12 | ≥ 8.0.0-BETA1, < 8.0.12
Ubuntu1 product
  • symfonyAll versions (No fix recorded)

5 vendors · 5 products

References

8 links