CVE-2026-0864: Configuration Injection via Carriage Return (\r) in write() method
CSIRTS triage
- 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
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 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.
- unknownMultiple vulnerabilities in CPython (June 25, 2026)cert-fr-avis
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