CVE-2026-55967
CSIRTS triage
- What
- The AES-GCM streaming APIs do not reject messages larger than 64 GiB, which can lead to counter wrap and keystream reuse.
- Who is affected
- Deployments using AES-GCM streaming APIs.
- Urgency
- Remediation is urgent due to the potential for cryptographic vulnerabilities, although exploitation has not been reported.
- Action
- Review and update the implementation of AES-GCM streaming APIs.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
Advisory coverage (1)
External references
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[](https://www.csirts.com/cve/CVE-2026-55967)