Every CVE Search/ Get API key

CVE-2020-35884

HTTP Request smuggling in tiny_http

6.5 MediumFix available

An issue was discovered in the tiny_http crate through 2020-06-16 for Rust. HTTP Request smuggling can occur via a malformed Transfer-Encoding header.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

1.09%Up 0.7 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 6.5

An issue was discovered in the tiny_http crate through 2020-06-16 for Rust. HTTP Request smuggling can occur via a malformed Transfer-Encoding header.

Record
CVE-2020-35884
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS 2.0
6.4 MediumAV:N/AC:L/Au:N/C:P/I:P/A:N
Weakness
CWE-444
Updated
2026-11-02
CVE List No score

An issue was discovered in the tiny_http crate through 2020-06-16 for Rust. HTTP Request smuggling can occur via a malformed Transfer-Encoding header.

Record
CVE-2020-35884
Updated
2026-11-02
EUVDEUVD-2021-1626 No score

An issue was discovered in the tiny_http crate through 2020-06-16 for Rust. HTTP Request smuggling can occur via a malformed Transfer-Encoding header.

Record
EUVD-2021-1626
Updated
2026-11-03
GitHub AdvisoriesGHSA-7v2r-wxmg-mgvc 6.5

HTTP Request smuggling in tiny_http

HTTP pipelining issues and request smuggling attacks are possible due to incorrect Transfer encoding header parsing. It is possible conduct HTTP request smuggling attacks (CL:TE/TE:TE) by sending invalid Transfer Encoding headers. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other than their own.

Record
GHSA-7v2r-wxmg-mgvc
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-444
Updated
2026-11-02
OSV 6.5

An issue was discovered in the tiny_http crate through 2020-06-16 for Rust. HTTP Request smuggling can occur via a malformed Transfer-Encoding header.

Record
CVE-2020-35884
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Updated
2026-11-02
OSVGHSA-7v2r-wxmg-mgvc 6.5

HTTP Request smuggling in tiny_http

HTTP pipelining issues and request smuggling attacks are possible due to incorrect Transfer encoding header parsing. It is possible conduct HTTP request smuggling attacks (CL:TE/TE:TE) by sending invalid Transfer Encoding headers. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other than their own.

Record
GHSA-7v2r-wxmg-mgvc
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-444
Updated
2026-11-02
OSVRUSTSEC-2020-0031 6.5

HTTP Request smuggling through malformed Transfer Encoding headers

HTTP pipelining issues and request smuggling attacks are possible due to incorrect Transfer encoding header parsing.

It is possible conduct HTTP request smuggling attacks (CL:TE/TE:TE) by sending invalid Transfer Encoding headers.

By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other than their own.

Record
RUSTSEC-2020-0031
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
tiny_http
crates.io
before 0.8.0
0.8.0
tiny_http
crates.io
0.0.0-0 up to 0.6.3, 0.7.0-0 up to 0.8.0
0.6.30.8.0

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-35884 is a medium vulnerability (CVSS 6.5) in Fedoraproject Fedora, published June 16, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.09%, the 65th percentile. Fixed in tiny_http 0.8.0.

References

Show 6 moreShow less
MoveEnter Open