In Nim before 1.2.6, the standard library asyncftpclient lacks a check for whether a…
Priority MEDIUM 48CWE-74Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
In Nim before 1.2.6, the standard library asyncftpclient lacks a check for whether a message contains a newline character.
Why it matters now
EPSS 0.03219 88th percentileScored 2026-11-07
Public exploit Yes 4 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
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 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2020-15690
References
Exploit 4
- https://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/asyncftpclient.nim#L145
- https://consensys.net/diligence/vulnerabilities/nim-asyncftpd-crlf-injection/
- https://github.com/tintinweb/pub/tree/master/pocs/cve-2020-15690
- [oss-security] 20210204 [CVE-2020-15690] Nim - stdlib asyncftpd - Crlf Injection
More nim-lang Nim vulnerabilities
- TI-2020-12364 In Nim 1.2.4, the standard library browsers mishandles the URL argument to… CVSS 3.1CRITICAL 9.8
- TI-2021-04471 Nimble arbitrary code execution for specially crafted package metadata CVSS 3.1HIGH 8.8
- TI-2021-04473 Nimble fails to validate certificates due to insecure httpClient defaults CVSS 3.1HIGH 8.1
- TI-2020-12366 In Nim 1.2.4, the standard library httpClient fails to properly validate the server… CVSS 3.1HIGH 7.5
- TI-2021-04472 Nimble falls back to insecure http url when fetching packages CVSS 3.1HIGH 7.5
- TI-2021-10206 Nim stdlib httpClient does not validate peer certificates by default CVSS 3.1HIGH 7.5
Sources
- CVE-2020-15690 · CVE Program
- CVE-2020-15690 · NVD
- FIRST EPSS
- CVE-2020-15690 · Red Hat security data · CC BY 4.0
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