libboron in Boron 2.0.8 has a heap-based buffer overflow in ur_strInitUtf8 at string.c.
Priority HIGH 73CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
libboron in Boron 2.0.8 has a heap-based buffer overflow in ur_strInitUtf8 at string.c.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00859 58th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
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 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-40295
- 2026-10-03 Alias added: GHSA-v263-ghf9-h2rx
References
More 0branch Boron vulnerabilities
- TI-2023-21136 libboron in Boron 2.0.8 has a heap-based buffer overflow in ur_parseBlockI at i_parse_blk.c. CVSS 3.1MEDIUM 6.5
Sources
- CVE-2023-40295 · CVE Program
- CVE-2023-40295 · NVD
- FIRST EPSS
- GHSA-v263-ghf9-h2rx · GitHub Advisory Database · CC BY 4.0
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