CVE-2017-9785 json
Deserialization of Untrusted Data in NancyFX Nancy
published 2017-07-20 9 y ago modified 2026-06-17 4 mo ago also GHSA-mx3q-j2g2-5qxq , EUVD-2022-4645
- cvss
- 9.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.0%
- EPSS 3.0% chance of exploitation in 30 days, percentile 87%
- public exploits
- 0
- none known
Summary
Csrf.cs in NancyFX Nancy before 1.4.4 and 2.x before 2.0-dangermouse has Remote Code Execution via Deserialization of JSON data in a CSRF Cookie.
Patch / fix
Exploit prediction
3.01% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | Nancy | <1.4.4 >=2.0.0-alpha, <2.0.0 |
1.4.4 2.0.0 |
Affected products
- NancyFX NancyFX Framework Up to 2.0.0
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
github.com
/NancyFx/Nancy/releases/tag/v1.4.4
web, release-notes, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2017-9785
advisory
Sources
- CVE List CVE-2017-9785
- GitHub Advisory GHSA-mx3q-j2g2-5qxq
- NVD CVE-2017-9785
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.