CVE-2026-43973: gun HTTP/1.1 response buffer has no size limit allowing server-controlled memory exhaustion
CSIRTS triage
- What
- The gun HTTP/1.1 response buffer lacks a size limit, allowing for potential memory exhaustion.
- Who is affected
- Deployments using the gun HTTP/1.1 response may be affected.
- Urgency
- Remediation urgency is unknown due to lack of severity information.
- Action
- Monitor for further details and updates.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43973
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-2026-439730.38% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 30% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-43973 | 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 Microsoft Azure Linux (June 24, 2026)cert-fr-avis
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