Dashboard / CVE-2026-125757

CVE-2026-125757

CRITICAL 1 PoC
INFO Priority: 0.08 BB Relevance: 74/100
Published: 2026-11-10 Modified: 2026-11-12 First seen: 2026-11-10 Status: active

Attack Surface

Network Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: High
UI: None
S: X
AT: None
VC: High
VI: High
VA: High

Description

mailcow: dockerized before 2026-11 contains a server-side template injection vulnerability that allows domain administrators to execute commands in the shared rspamd container by storing a malicious domain-wide footer. Attackers can embed a Jinja macro with an os.execute default value, rendered by the rspamd MOO_FOOTER prefilter, to read or inject mail for every tenant and disable filtering.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
mailcow mailcow: dockerized 0 < 2026-11
mailcow mailcow: dockerized 0 < 2026-11

References & Advisories (5)

Proof of Concept (1)

—
https://github.com/Faceless0x7/CVE-2026-125757
nomi-sec

Bug Bounty Relevance

74 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction
✓ PoC available (1)

CVSS Score

9.4 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.82%
Raw Score 0.008240
Percentile 57.9%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00824
2026-11-12
0.00824

Intelligence Sources

mitre ref →
nvd ref →

External Links