CVE-2023-6017
H2O S3 Bucket Takeover
H2O included a reference to an S3 bucket that no longer existed allowing an attacker to take over the S3 bucket URL.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
H2O S3 Bucket Takeover
H2O included a reference to an S3 bucket that no longer existed allowing an attacker to take over the S3 bucket URL.
- Record
CVE-2023-6017- CVSS 3.0
- 8.7 High
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-840
- Updated
- 2026-11-02
EUVDEUVD-2023-58282
H2O included a reference to an S3 bucket that no longer existed allowing an attacker to take over the S3 bucket URL.
- Record
EUVD-2023-58282- CVSS 3.0
- 8.7 High
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-pwcm-766j-45vc
H2O included a reference to an S3 bucket that no longer existed allowing an attacker to take over...
H2O included a reference to an S3 bucket that no longer existed allowing an attacker to take over the S3 bucket URL.
- Record
GHSA-pwcm-766j-45vc- CVSS 3.0
- 8.7 High
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N - Updated
- 2026-11-02
NVD
H2O included a reference to an S3 bucket that no longer existed allowing an attacker to take over the S3 bucket URL.
- Record
CVE-2023-6017- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N - CVSS 3.0
- 8.7 High
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-840
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-6017 is a high vulnerability (CVSS 8.7) in H2o, published November 16, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.85%, the 58th percentile. No source names a fixed version.