CVE-2026-0864: Configuration Injection via Carriage Return (\r) in write() method

unknownCVE-2026-0864

CSIRTS triage

Other

What: This vulnerability allows configuration injection via carriage return in the write() method.
Who is affected: Deployments using the affected write() method.
Urgency: Remediation is necessary, but severity is currently unknown.
Action: Investigate and apply necessary mitigations.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: unknown
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-0864

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-08640.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-0864	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[UPDATE] [high] CPython: Multiple vulnerabilitiescert-bund
unknownMultiple vulnerabilities in CPython (June 25, 2026)cert-fr-avis

Recent advisories for Configuration Injection via

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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