What is CVE-2020-35884?

CVE-2020-35884 is a medium-severity security vulnerability in tiny_http (rust), affecting versions < 0.8.0. It is fixed in 0.8.0.

How severe is CVE-2020-35884?

CVE-2020-35884 has a CVSS score of 6.5 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Which versions of tiny_http are affected by CVE-2020-35884?

tiny_http (rust) versions < 0.8.0 is affected.

Is there a fix for CVE-2020-35884?

Yes. CVE-2020-35884 is fixed in 0.8.0. Upgrade to this version or later.

Is CVE-2020-35884 exploitable, and should I be worried?

Whether CVE-2020-35884 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether CVE-2020-35884 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

CVE-2020-35884 in tiny_http

Q: How severe is CVE-2020-35884?

CVE-2020-35884 has a CVSS score of 6.5 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Q: Which versions of tiny_http are affected by CVE-2020-35884?

tiny_http (rust) versions < 0.8.0 is affected.

Q: Is there a fix for CVE-2020-35884?

Yes. CVE-2020-35884 is fixed in 0.8.0. Upgrade to this version or later.

Q: Is CVE-2020-35884 exploitable, and should I be worried?

Whether CVE-2020-35884 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether CVE-2020-35884 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix CVE-2020-35884?

Upgrade tiny_http to 0.8.0 or later.

Summary

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.

Impact

CVE-2020-35884 has a CVSS score of 6.5 (Medium). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (0.8.0); upgrading removes the vulnerable code path.

Affected versions

tiny_http (< 0.8.0)

Security releases

tiny_http → 0.8.0 (rust)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

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Remediation advice

Upgrade tiny_http to 0.8.0 or later to resolve this vulnerability.

Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.

Frequently Asked Questions

What is CVE-2020-35884? CVE-2020-35884 is a medium-severity security vulnerability in tiny_http (rust), affecting versions < 0.8.0. It is fixed in 0.8.0.
How severe is CVE-2020-35884? CVE-2020-35884 has a CVSS score of 6.5 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
Which versions of tiny_http are affected by CVE-2020-35884? tiny_http (rust) versions < 0.8.0 is affected.
Is there a fix for CVE-2020-35884? Yes. CVE-2020-35884 is fixed in 0.8.0. Upgrade to this version or later.
Is CVE-2020-35884 exploitable, and should I be worried? Whether CVE-2020-35884 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether CVE-2020-35884 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix CVE-2020-35884? Upgrade tiny_http to 0.8.0 or later.