VulertSecurity VulertSecurity

Vulnerability Database · Debian · Package report

python-urllib3: vulnerability history, versions and safety

python-urllib3 is a package in the Debian ecosystem. Vulert records 29 vulnerabilities for it across 25 releases, from Nov -0001 to Jun 2026. Each vulnerability names the versions it affects, the fixed version to move to, and a workaround where no fix has been published.

i
29 vulnerabilities recorded U29
i
8 with no fix published

No patched version yet — these are the ones to plan around.

See the unfixed vulnerabilities →
i
6 in the last 12 months

Most recent disclosure 19 Jun 2026.

See the disclosure history →
i
0 malicious-package vulnerabilities

No published version shipped hostile code.

See all python-urllib3 vulnerabilities

Vulert verdict on python-urllib3 i

Updated on 23 Oct 2026

Careful: 8 of the 29 vulnerabilities Vulert records for this package have no fix yet. Plan around those, or apply the workaround listed for each. The rest have a fixed version to move to.

Long-term outlook: usable, but needs attention 29 vulnerabilities on record across 2026 years, 6 in the last year.

What to do: Plan around the 8 vulnerabilities with no published fix: each lists the affected range and any workaround that reduces exposure. No fix yet: Vulert alerts you the moment one is published. Monitor it with Vulert →

  • Vulnerabilities on record 29 over 2026 years · 6 in the last year i
  • Latest disclosure 19 Jun 2026 i
  • Highest CVSS 9.8 i
  • With no published fix 8 i

Concerned about your application's security?

Vulert continues monitoring your dependencies and alerts you when new vulnerabilities are disclosed. No installation and no source-code access required.

01 Versions

Which versions are affected

Every version Vulert holds for python-urllib3, newest first, with the vulnerabilities that name it. A version with a count of zero has no recorded vulnerabilities; open a version to see the vulnerabilities it is exposed to.

Newest 25 of 25 versions on record. Severity counts are the vulnerabilities recorded against that exact release.

02 Disclosure history

How often vulnerabilities are recorded

  • 0 2
  • 2018 2
  • 2019 4
  • 2020 3
  • 2021 3
  • 2023 4
  • 2024 3
  • 2025 3
  • 2026 5

Counted by the year Vulert recorded each vulnerability — the same date the table below shows as disclosed. 6 of the 29 were recorded in the last 12 months.

03 Vulnerabilities

Recorded vulnerabilities for python-urllib3

The 5 most severe of 29 vulnerabilities recorded for this package

Search all 29 in the database →
Vulnerability Severity Fixed version ↑ Disclosed ↑
Cross-Origin Credential Exposure in urllib3: CVE-2018-20060 9.8 critical 1.24-1 11 Dec 2018
Denial of Service Vulnerability in urllib3 2.6.3: Decompression Bomb Bypass 7.5 high No fix published 19 Jun 2026
Critical SSL Verification Bypass in urllib3 Package 7.5 high 1.25.6-4 18 Apr 2019
Denial of Service Vulnerability in urllib3 Package: Inefficient URL Encoding Algorithm 7.5 high 1.25.8-1 06 Mar 2020
Denial of Service Vulnerability in urllib3: Catastrophic Backtracking in URL Parsing 7.5 high 1.26.5-1~exp1 29 Jun 2021

Vulnerability wrong, a fix missing, or a package we should cover? Report it and we will fix the record. Report Vulnerability Provide Feedback

Updated: 23/Oct/2026 · Vulnerabilities in our DB: 524315

Subscribe to Vulert on Telegram
Daily digest of new CVEs, critical and high severity, affected packages and fixes — plus a weekly roundup.
Join the channel →

Questions

About python-urllib3

Is python-urllib3 safe to use?

Vulert records 29 vulnerabilities for python-urllib3 in Debian: 0 critical, 0 high, 0 medium and 0 low, plus 29 not yet rated. 8 of them have no published fix yet, so those are the ones to avoid or mitigate.

How many vulnerabilities does python-urllib3 have?

29 vulnerabilities are recorded for python-urllib3 in the Debian ecosystem: 0 critical, 0 high, 0 medium and 0 low, plus 29 not yet rated. The ledger on this page lists the same counts next to the date of the most recent disclosure.

How often are new python-urllib3 vulnerabilities disclosed?

6 vulnerabilities were recorded for python-urllib3 in the last 12 months, and the oldest entry in this database dates to 30 Nov -0001. Recency matters more than a lifetime total: it shows how actively new issues are being disclosed for the package you are considering.

Which versions of python-urllib3 are affected?

Each vulnerability on this page lists the affected version range and the fixed version to move to. Open the vulnerability for the version you actually run — fixes are specific to a release line, not to the package as a whole.

How do I monitor python-urllib3 for upcoming vulnerabilities?

Upload the manifest or SBOM for your application at vulert.com/scanner and Vulert keeps checking the python-urllib3 version you actually run against new disclosures, then alerts you when one affects it. There is no installation and no source-code access required.