Medium severity5.4NVD Advisory· Published Jan 27, 2020· Updated Jun 17, 2026
CVE-2020-5207
CVE-2020-5207
Description
In Ktor before 1.3.0, request smuggling is possible when running behind a proxy that doesn't handle Content-Length and Transfer-Encoding properly or doesn't handle \n as a headers separator.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
io.ktor:ktor-client-cioMaven | < 1.3.0 | 1.3.0 |
io.ktor:ktor-server-cioMaven | < 1.3.0 | 1.3.0 |
Affected products
4- ghsa-coords2 versions
< 1.3.0+ 1 more
- (no CPE)range: < 1.3.0
- (no CPE)range: < 1.3.0
- Ktor.io/Ktorv5Range: < 1.3.0
Patches
Vulnerability mechanics
References
4- github.com/ktorio/ktor/pull/1547nvdPatchThird Party AdvisoryWEB
- github.com/advisories/GHSA-xrr9-rh8p-433vghsaADVISORY
- github.com/ktorio/ktor/security/advisories/GHSA-xrr9-rh8p-433vnvdThird Party AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2020-5207ghsaADVISORY
News mentions
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