# httplib2 (PyPI) vulnerabilities

4 known vulnerabilities (2 high, 1 medium), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 0.32.1 (Oct 28, 2026): no advisory affects it
- Newest unaffected release: 0.32.1 (Oct 28, 2026), the latest release
- Weekly downloads: 33.3M
- Dependents: 5,447
- Releases: 43 since 0.7.3 (Mar 2, 2012)
- Registry: https://pypi.org/project/httplib2/
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-59939: 0.7.3 to 0.31.2 (0.32.0 is outside it)
- CVE-2021-21240: 0.7.3 to 0.18.1 (0.19.0 is outside it)
- CVE-2020-11078: 0.7.3 to 0.17.4 (0.18.0 is outside it)
- CVE-2013-2037: 0.7.3 to 0.9.2 (0.10.3 is outside it)

## Advisories (4)

### [CVE-2026-59939](https://cve.now/CVE-2026-59939): httplib2: Decompression Bomb Denial of Service via Unbounded gzip/deflate Response Handling

- Severity: High 7.5
- Published: Jul 8, 2026
- Affected: fixed in 0.32.0.
- Fixed in 0.32.0 (released Jun 26, 2026, 12 days before disclosure).
- The latest release, 0.32.1, is not affected.

### [CVE-2021-21240](https://cve.now/CVE-2021-21240): Regular Expression Denial of Service in httplib2

- Severity: High 7.5
- Published: Feb 8, 2021
- Affected: fixed in 0.19.0; fixed in 0.19.0.
- Fixed in 0.19.0 (released Feb 7, 2021, 1 day before disclosure).
- The latest release, 0.32.1, is not affected.

### [CVE-2020-11078](https://cve.now/CVE-2020-11078): CRLF injection in httplib2

- Severity: Medium 6.8
- Published: May 20, 2020
- Affected: fixed in 0.18.0; fixed in 0.18.0.
- Fixed in 0.18.0 (released May 20, 2020, the day of disclosure).
- The latest release, 0.32.1, is not affected.

### [CVE-2013-2037](https://cve.now/CVE-2013-2037): httplib2 0.7.2, 0.8, and earlier, after an initial connection is made, does not verify that the server hostname matches a domain name in…

- Severity: Unrated
- Published: Jan 18, 2014
- Affected: fixed in 0.10.1; fixed in 0.9.
- Fixed in 0.10.3 (released Feb 6, 2017, 1115 days after disclosure, the advisory names 0.10.1, which was never published).
- The latest release, 0.32.1, is not affected.

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