CVE-2026-22699
RustCrypto SM2-PKE has Unchecked AffinePoint Decoding (unwrap) in decrypt()
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
RustCrypto: Elliptic Curves is general purpose Elliptic Curve Cryptography (ECC) support, including types and traits for representing various elliptic curve forms, scalars, points, and public/secret keys composed thereof. In versions 0.14.0-pre.0 and 0.14.0-rc.0, a denial-of-service vulnerability exists in the SM2 PKE decryption path where an invalid elliptic-curve point (C1) is decoded and the resulting value is unwrapped without checking. Specifically, AffinePoint::from_encoded_point(&encoded_c1) may return a None/CtOption::None when the supplied coordinates are syntactically valid but do not lie on the SM2 curve. The calling code previously used .unwrap(), causing a panic when presented with such input. This issue has been patched via commit 085b7be.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Analyzed | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.44% · top 62% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
- affected = 0.14.0-pre.0
- affected = 0.14.0-rc.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- crates.iosm2GHSA-78p6-6878-8mj6 (opens in a new tab)
References (3)
- https://github.com/RustCrypto/elliptic-curves/security/advisories/GHSA-78p6-6878-8mj6 (opens in a new tab)x_refsource_CONFIRMexploit
- https://github.com/RustCrypto/elliptic-curves/pull/1602 (opens in a new tab)x_refsource_MISC
- https://github.com/RustCrypto/elliptic-curves/commit/085b7bee647029bd189e1375203418205006bcab (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-78p6-6878-8mj6 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-22699)Record last updated .