CVE Explorer

CVE-2026-42874

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 s

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c71907701d370a712e9d8d658dc558f1468494612138f981d868959c633f33fc

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"microdot","vendor":"miguelgrinberg","versions":[{"status":"affected","version":"< 2.6.1"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:a8f962001c7df0737e97ddafa5c9964f807283c81d0ba623886b9c1af9e3ca9b · sha256:d79178dbb088893f… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:a8f962001c7df0737e97ddafa5c9964f807283c81d0ba623886b9c1af9e3ca9b · sha256:d79178dbb088893f… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-113","description":"CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:a8f962001c7df0737e97ddafa5c9964f807283c81d0ba623886b9c1af9e3ca9b · sha256:d79178dbb088893f… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions

{"name":"https://github.com/miguelgrinberg/microdot/blob/main/CHANGES.md","tags":["x_refsource_MISC"],"url":"https://github.com/miguelgrinberg/microdot/blob/main/CHANGES.md"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:a8f962001c7df0737e97ddafa5c9964f807283c81d0ba623886b9c1af9e3ca9b · sha256:d79178dbb088893f… · /containers/cna/references/2

{"name":"https://github.com/miguelgrinberg/microdot/commit/99b281b45faef8472410f2d56bfef496dfbd95d5","tags":["x_refsource_MISC"],"url":"https://github.com/miguelgrinberg/microdot/commit/99b281b45faef8472410f2d56bfef496dfbd95d5"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:a8f962001c7df0737e97ddafa5c9964f807283c81d0ba623886b9c1af9e3ca9b · sha256:d79178dbb088893f… · /containers/cna/references/1

{"name":"https://github.com/miguelgrinberg/microdot/security/advisories/GHSA-7wc8-wvc4-m498","tags":["x_refsource_CONFIRM"],"url":"https://github.com/miguelgrinberg/microdot/security/advisories/GHSA-7wc8-wvc4-m498"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:a8f962001c7df0737e97ddafa5c9964f807283c81d0ba623886b9c1af9e3ca9b · sha256:d79178dbb088893f… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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