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MIME library CVE-2026-57228

MEDIUM
2026-09-14 vendor:ubuntu
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vuln.today AI
6.5 MEDIUM

Network-reachable via malicious MIME content, no auth required; over-read yields limited info disclosure and potential crash only.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N

Estimated by vuln.today — no official severity rating has been published for this CVE yet.

Lifecycle Timeline

1
Analysis Generated
Sep 14, 2026 - 09:09 vuln.today

DescriptionCVE.org

[mime: buffer over read in quoted printable decoding]

AnalysisAI

Buffer over-read in quoted-printable MIME decoding exposes systems that process MIME-encoded content to out-of-bounds memory reads, potentially causing crashes or leaking adjacent heap contents. The vulnerability resides in the quoted-printable decoder of a MIME parsing library, affecting any application that processes untrusted MIME input such as email clients, mail transfer agents, or content-processing pipelines. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the target application processes attacker-controlled MIME content using the affected quoted-printable decoder, specifically content containing malformed quoted-printable sequences such as a truncated '=XX' escape or dangling soft-line-break '=' at a buffer boundary. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment With no CVSS vector, KEV listing, EPSS score, or POC data available, risk must be estimated structurally from the vulnerability class and attack surface. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation No specific patch version was provided in the source data. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-57228 vulnerability details – vuln.today

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