CVE-2021-44420: canonical ubuntu_linux
Vulnerability summary
CVE-2021-44420 is a high (CVSS 7.5) vulnerability in canonical ubuntu_linux. EPSS estimates a 2.42% chance of exploitation in the next 30 days, higher than 84.1% of scored vulnerabilities.
Severe, CVSS 7.3 (NVD); no exploitation reported by the 5 checked sources; EPSS 2% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 3 · Related 1Timeline
- 07-12-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
In Django 2.2 before 2.2.25, 3.1 before 3.1.14, and 3.2 before 3.2.10, HTTP requests for URLs with trailing newlines could bypass upstream access control based on URL paths.
CVSS metrics
7 scores · 5 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated7.3HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- OSV · DebianEcosystem advisory · calculated7.3HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- NVDNIST7.3HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- OSV · AlpineEcosystem advisory · calculated7.3HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS trend
Probability
2.42%
Chance of exploitation in the next 30 days
Percentile
84%
Versus all other CVEs
30-day change
Decrease -0.07 pp
From 2.49% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- python-django< 2:3.2.10-1
- debian_linuxEOL10.0 | 11.0
Alpine1 product
- py3-django< 3.2.12-r0
Canonical1 product
- ubuntu_linuxEOL20.04 | 21.04 | 21.10
Djangoproject1 product
- django≥ 2.2, < 2.2.25 | ≥ 3.1, < 3.1.14 | ≥ 3.2, < 3.2.10
Fedoraproject1 product
- fedoraEOL35
Mageia1 product
- python-django< 3.1.14-1.mga8
Opensuse1 product
- python-sentry-sdk&distro=openSUSE Tumbleweed< 2.20.0-1.1 | < 1.5.4-1.1
PyPI1 product
- django≥ 2.2a1, < 2.2.25 | ≥ 3.0a1, < 3.1.14 | ≥ 3.2a1, < 3.2.10 | ≥ 3.2, < 3.2.10
Redhat1 product
- satellite6.0
Ubuntu1 product
- python-django< 2:2.2.12-1ubuntu0.8
10 vendors · 11 products
References
24 links- groups.google.com/forum/X Refsource MISC
- www.openwall.com/lists/oss-security/2021/12/07/1X Refsource CONFIRMWEBMailing ListPatchThird Party Advisory
- www.djangoproject.com/weblog/2021/dec/07/security-releases/X Refsource CONFIRMWEBARTICLEREPORTPatchVendor Advisory
Show all 24 references
- github.com/django/djangoPACKAGE
