CVE-2020-11078 is a medium-severity (CVSS 6.8) CWE-93 vulnerability in httplib2. A fix is available for httplib2 — see the affected versions and patch details below.
CRLF injection in httplib2
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2020-11078 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,166 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
httplib2Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
In httplib2 before version 0.18.0, an attacker controlling unescaped part of uri for httplib2.Http.request() could change request headers and body, send additional hidden requests to same server. This vulnerability impacts software that uses httplib2 with uri constructed by string concatenation, as opposed to proper urllib building with escaping. This has been fixed in 0.18.0.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | httplib2 | all versions | 0.18.0pip install --upgrade 'httplib2==0.18.0' |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for httplib2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update httplib2 to 0.18.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-11078 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2020-11078 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2020-11078. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
While Red Hat Quay 3.0, and 3.1 used the httplib2 library it was removed in versions 3.2 and later. Upgrade to 3.2 or later to fix this vulnerability in Red Hat Quay. Red Hat Gluster Storage 3 delivers the affected version of the python-httplib2 library. However the library is not used by Gluster hence the impact by…
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat Enterprise Linux 7 | resource-agents-0:4.1.1-61.el7_9.4 | RHSA-2020:5004 |
| Red Hat Enterprise Linux 7 | fence-agents-0:4.2.1-41.el7_9.2 | RHSA-2020:5003 |
| Red Hat Enterprise Linux 8 | resource-agents-0:4.1.1-68.el8 | RHSA-2020:4605 |
| Red Hat OpenStack Platform 16.1 | python-httplib2-0:0.13.1-2.el8ost | RHSA-2021:2116 |
Frequently Asked Questions
Is CVE-2020-11078 in your dependencies?
O3 Security finds CVE-2020-11078 across PyPI dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.