An issue was discovered in hyper v0.13.7.
Priority HIGH 72CWE-770Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-770.
Summary
An issue was discovered in hyper v0.13.7. h2-0.2.4 Stream stacking occurs when the H2 component processes HTTP2 RST_STREAM frames. As a result, the memory and CPU usage are high which can lead to a Denial of Service (DoS).
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01121 66th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed h2 (crates.io): 0.3.17
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | h2 (crates.io) | before 0.3.17 | 0.3.17 | Patch available | GHSA-f8vr-r385-rh5r |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- h2 (crates.io) Vendor— Affected before 0.3.17 Fixed in 0.3.17 Patch available GHSA-f8vr-r385-rh5r
Remediation
- Fix · GHSA-f8vr-r385-rh5r h2 (crates.io) Fixed in 0.3.17 Advisory →
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2023-26964
- 2026-10-03 Alias added: GHSA-f8vr-r385-rh5r
References
Advisory 3
Sources
- CVE-2023-26964 · CVE Program
- CVE-2023-26964 · NVD
- FIRST EPSS
- GHSA-f8vr-r385-rh5r · GitHub Advisory Database · CC BY 4.0
- CVE-2023-26964 · Red Hat security data · CC BY 4.0
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