An issue was discovered in the openssl crate before 0.9.0 for Rust.
Priority LOW 37CWE-295Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-295.
Summary
An issue was discovered in the openssl crate before 0.9.0 for Rust. There is an SSL/TLS man-in-the-middle vulnerability because certificate verification is off by default and there is no API for hostname verification.
Why it matters now
EPSS 0.00745 55th percentileScored 2026-11-07
Fix Fixed openssl (crates.io): 0.9.0
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | openssl (crates.io) | before 0.9.0 | 0.9.0 | Patch available | GHSA-34p9-f4q3-c4r7 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- openssl (crates.io) Vendor— Affected before 0.9.0 Fixed in 0.9.0 Patch available GHSA-34p9-f4q3-c4r7
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:rust-openssl_project:rust-openssl:*:*:*:*:*:*:*:* | before 0.9.0 | Vulnerable | rust-openssl |
- cpe:2.3:a:rust-openssl_project:rust-openssl:*:*:*:*:*:*:*:* Versions before 0.9.0 Vulnerable ·rust-openssl
Remediation
- Fix · GHSA-34p9-f4q3-c4r7 openssl (crates.io) Fixed in 0.9.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2016-10931
- 2026-10-03 Alias added: GHSA-34p9-f4q3-c4r7
References
More Rust-openssl vulnerabilities
- TI-2018-14959 An issue was discovered in the openssl crate before 0.10.9 for Rust. CVSS 3.0CRITICAL 9.8
- TI-2026-30198 rust-openssl: MdCtxRef::digest_final() writes past caller buffer with no length check CVSS 4.0HIGH 8.1
- TI-2026-30193 rust-openssl: Deriver::derive and PkeyCtxRef::derive can overflow short buffers on OpenSSL 1.1.1 CVSS 4.0HIGH 7.2
- TI-2026-30300 rust-openssl: Unchecked callback-returned length in PSK and cookie generate trampolines… CVSS 4.0HIGH 8.3
- TI-2026-30195 rust-openssl: Incorrect bounds assertion in aes key wrap CVSS 4.0HIGH 7.2
- TI-2026-30194 rust-openssl: Out-of-bounds read in PEM password callback when user callback returns an oversized length CVSS 4.0LOW 1.7
Sources
- CVE-2016-10931 · CVE Program
- CVE-2016-10931 · NVD
- FIRST EPSS
- GHSA-34p9-f4q3-c4r7 · GitHub Advisory Database · CC BY 4.0
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