Improper Certificate Validation in CODESYS Git
Priority LOW 33CWE-295Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-295.
Summary
Affected versions of CODESYS Git in Versions prior to V1.1.0.0 lack certificate validation in HTTPS handshakes. CODESYS Git does not implement certificate validation by default, so it does not verify that the server provides a valid and trusted HTTPS certificate. Since the certificate of the server to which the connection is made is not properly verified, the server connection is vulnerable to a man-in-the-middle attack.
Why it matters now
EPSS 0.00474 41st percentileScored 2026-11-08
Fix Fixed CODESYS Git (CODESYS): V1.1.0.0
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 |
|---|---|---|---|---|---|
| CODESYS | CODESYS Git | CODESYS Git to before V1.1.0.0 | V1.1.0.0 | Patch available | CNA |
- CODESYS Git VendorCODESYS Affected CODESYS Git to before V1.1.0.0 Fixed in V1.1.0.0 Patch available CNA
Remediation
- Fix · CNA CODESYS Git (CODESYS) Fixed in V1.1.0.0
Timeline
- 2026-10-02 Threatist record created from CVE-2021-34599
- 2026-10-03 Alias added: GHSA-hgcw-m9r8-99rp
References
Sources
- CVE-2021-34599 · CVE Program
- CVE-2021-34599 · NVD
- FIRST EPSS
- GHSA-hgcw-m9r8-99rp · GitHub Advisory Database · CC BY 4.0
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