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2 vulnerabilities found for microdot by miguelgrinberg
CVE-2026-42874 (GCVE-0-2026-42874)
Vulnerability from nvd – Published: 2026-05-11 19:04 – Updated: 2026-05-13 14:40
VLAI
Title
Microdot: HTTP response splitting in Response.set_cookie()
Summary
Microdot is a minimalistic Python web framework. Prior to 2.6.1, the Response.set_cookie() method does not sanitize its string arguments, and in particular will not detect the presence of the \r\n sequence in them. This can be a potential source of header injection attacks. For a header injection attack through this issue to be possible, an attacker must first infiltrate the client (for example through an independent XSS attack), so that it can send malicious information that is destined to be stored in a cookie by the server on behalf of the victim. An attacker that infiltrates one client can only orchestrate a header injection attack for that client, all other clients that were not infiltrated are safe. This vulnerability is fixed in 2.6.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/miguelgrinberg/microdot/securi… | x_refsource_CONFIRM |
| https://github.com/miguelgrinberg/microdot/commit… | x_refsource_MISC |
| https://github.com/miguelgrinberg/microdot/blob/m… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| miguelgrinberg | microdot |
Affected:
< 2.6.1
|
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CVE-2026-42874 (GCVE-0-2026-42874)
Vulnerability from cvelistv5 – Published: 2026-05-11 19:04 – Updated: 2026-05-13 14:40
VLAI
Title
Microdot: HTTP response splitting in Response.set_cookie()
Summary
Microdot is a minimalistic Python web framework. Prior to 2.6.1, the Response.set_cookie() method does not sanitize its string arguments, and in particular will not detect the presence of the \r\n sequence in them. This can be a potential source of header injection attacks. For a header injection attack through this issue to be possible, an attacker must first infiltrate the client (for example through an independent XSS attack), so that it can send malicious information that is destined to be stored in a cookie by the server on behalf of the victim. An attacker that infiltrates one client can only orchestrate a header injection attack for that client, all other clients that were not infiltrated are safe. This vulnerability is fixed in 2.6.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/miguelgrinberg/microdot/securi… | x_refsource_CONFIRM |
| https://github.com/miguelgrinberg/microdot/commit… | x_refsource_MISC |
| https://github.com/miguelgrinberg/microdot/blob/m… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| miguelgrinberg | microdot |
Affected:
< 2.6.1
|
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