An issue was discovered in urllib2 in Python 2.x through 2.7.16 and urllib in Python 3.x through 3.7.3. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \r\n (specifically in the path component of a URL that lacks a ? character) followed by an HTTP header or a Redis command. This is similar to the CVE-2019-9740 query string issue. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.
CVE-2019-9947
“—” beside the score: it is equal to NVD's CVSS score.
Score 6.1 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 6.1; sources differ by 0.0.
Also known asEUVD-2019-19301 (ENISA EUVD) · GHSA-89ff-5r66-wr8j (GitHub Security Advisories)Source: ENISA EUVD
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 6.1
- EG Score
- 6.1MEDIUMmedium confidence
- EG Risk
- 30EG Risk 30/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity61% × 45%Impact severity (EG Severity): CVSS 6.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation5.2% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 5.3%
- EPSS %ILE
- 92nd
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (6.1): severity, escalated by confirmed exploitation. This CVE's 6.1 is its impact severity (EG Severity), not escalated.
- EG Severity
- 6.1 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 5.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-25). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
March 23, 2019
Last Modified
October 14, 2026
Advisory Details (9)
Auto-updated Oct 7, 2026Affected: Red Hat Enterprise Linux 7.
https://access.redhat.com/errata/RHSA-2019:2030[SECURITY] [DLA 1835-2] python3.4 regression update
https://lists.debian.org/debian-lts-announce/2019/06/msg00026.html[SECURITY] [DLA 1835-1] python3.4 security update
https://lists.debian.org/debian-lts-announce/2019/06/msg00023.html[SECURITY] [DLA 1834-1] python2.7 security update
https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html[SECURITY] Fedora 29 Update: python3-3.7.3-3.fc29 - package-announce - Fedora mailing-lists
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JMWSKTNOHSUOT3L25QFJAVCFYZX46FYK/[SECURITY] Fedora 30 Update: python3-3.7.3-3.fc30 - package-announce - Fedora mailing-lists
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JXASHCDD4PQFKTMKQN4YOP5ZH366ABN4/Issue 35906: [CVE-2019-9947] Header Injection in urllib - Python tracker
https://bugs.python.org/issue35906Vendor Advisories for CVE-2019-9947(10)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- GHSA-89ff-5r66-wr8jGitHub Security AdvisoriesMedium
An issue was discovered in urllib2 in Python 2.x through 2.7.16 and urllib in Python 3.x through...
- RHSA-2020:1462Red Hat Product SecurityMedium
Red Hat Security Advisory: python security update
- RHSA-2020:1346Red Hat Product SecurityMedium
Red Hat Security Advisory: python security update
- RHSA-2020:1268Red Hat Product SecurityMedium
Red Hat Security Advisory: python security update
- RHBA-2020:0547Red Hat Product SecurityHigh
Red Hat Bug Fix Advisory: Container Image Rebuild for Ansible Tower 3.4 Dependency
- RHSA-2019:3725Red Hat Product SecurityMedium
Red Hat Security Advisory: rh-python36-python security, bug fix, and enhancement update
- RHSA-2019:3335Red Hat Product SecurityMedium
Red Hat Security Advisory: python27:2.7 security and bug fix update
- RHSA-2019:3520Red Hat Product SecurityMedium
Red Hat Security Advisory: python3 security and bug fix update
- +2 more
Patch Availability(12)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | python3.5-venv (3.5.2-2ubuntu0~16.04.8) @ xenial | 2026-10-07 | ubuntu |
| ubuntu | python2.7-minimal (2.7.3-0ubuntu3.14) @ precise | 2026-10-07 | ubuntu |
| ubuntu | python3.5-venv (3.5.2-2ubuntu0~16.04.13+esm13) @ xenial | 2026-10-07 | ubuntu |
| redhat | python-0:2.7.5-83.el7_6 | 2020-04-14 | redhat |
| redhat | python-0:2.7.5-63.el7_4 | 2020-04-07 | redhat |
| redhat | python-0:2.7.5-74.el7_5 | 2020-04-01 | redhat |
| redhat | ansible-tower-37/ansible-tower-memcached-rhel7:1.4.15-28 | 2020-02-18 | redhat |
| redhat | rh-python36-python-0:3.6.9-2.el7 | 2019-11-06 | redhat |
| redhat | python27:2.7-8010020190903182548.51c94b97 | 2019-11-05 | redhat |
| redhat | python3-0:3.6.8-15.1.el8 | 2019-11-05 | redhat |
| redhat | python-0:2.7.5-86.el7 | 2019-08-06 | redhat |
| redhat | python27-python-jinja2-0:2.6-15.el7 | 2019-05-22 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(5 across 3 ecosystems)
Debian:8(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python2.7 | 2.7.9-2, 2.7.9-2+deb8u1, 2.7.9-2+deb8u2 |
| — |
| python3.4 | 3.4.2-1, 3.4.2-1+deb8u1, 3.4.2-1+deb8u2 |
| — |
Debian:9(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python2.7 | 2.7.13-2, 2.7.13-2+deb9u1, 2.7.13-2+deb9u2, 2.7.13-2+deb9u3 |
| — |
| python3.5 | 3.5.3-1, 3.5.3-1+deb9u1 |
| — |
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python2.7 | — |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(3)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
Data Freshness Timeline
(refreshed 6× in last 7d / 41× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 99 of 201 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 102 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-31 16:28 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-30 16:29 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-29 16:28 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-28 16:27 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-27 16:27 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-27 12:25 UTCOSV refresh
- 2026-10-26 16:27 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-25 18:55 UTCEG score recompute
- 2026-10-25 16:28 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-24 16:28 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
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- 2026-10-18 16:28 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-18 09:39 UTCEG score recompute
- 2026-10-17 16:28 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-16 16:32 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-15 16:27 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-14 16:28 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-14 07:27 UTCEG score recompute
- 2026-10-14 07:27 UTCVendor advisory
- 2026-10-14 07:26 UTCGHSA enrichmentGHSA-89ff-5r66-wr8j · GitHub CVSS 6.1
- 2026-10-13 16:28 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
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- 2026-10-12 19:50 UTCEG score recompute
- 2026-10-12 16:29 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-12 00:13 UTCEG score recompute
- 2026-10-11 13:42 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-10 19:56 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-09 20:03 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-08 16:38 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-07 23:43 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-07 19:29 UTCVendor advisory
- 2026-10-07 19:28 UTCGHSA enrichmentGHSA-89ff-5r66-wr8j · GitHub CVSS 6.1
- 2026-10-07 18:29 UTCEG score recompute
- 2026-10-07 18:29 UTCVendor advisory
- 2026-10-07 18:29 UTCGHSA enrichmentGHSA-89ff-5r66-wr8j · GitHub CVSS 6.1
- 2026-10-06 15:13 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-05 17:39 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-04 23:18 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-10-03 14:22 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-09-30 14:59 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-09-30 10:30 UTCEG score recompute
- 2026-09-28 11:38 UTCOSV refresh
- 2026-09-27 13:40 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-09-26 15:54 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-09-26 00:20 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-09-24 13:59 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-09-22 14:43 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-09-21 20:28 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-09-19 15:37 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
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- 2026-09-11 09:32 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-09-08 15:04 UTCOSV refresh
- 2026-09-07 15:57 UTCEPSS rescoreEPSS 5.3% · 91st percentile
- 2026-09-06 13:44 UTCEPSS rescoreEPSS 5.3% · 91st percentile
- 2026-09-05 15:24 UTCEPSS rescoreEPSS 5.3% · 92nd percentile
- 2026-09-04 13:56 UTCEPSS rescoreEPSS 5.3% · 91st percentile
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- 2026-08-25 13:45 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
- 2026-08-22 01:11 UTCOSV refresh
- 2026-08-20 22:51 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
- 2026-08-19 17:00 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
- 2026-08-18 13:44 UTCEPSS rescoreEPSS 5.4% · 92nd percentile
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- 2026-08-16 02:11 UTCEPSS rescoreEPSS 5.4% · 91st percentile
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- 2026-08-13 21:57 UTCEPSS rescoreEPSS 5.4% · 91st percentile
- 2026-08-12 13:47 UTCEPSS rescoreEPSS 5.4% · 91st percentile
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- 2026-08-08 16:33 UTCEPSS rescoreEPSS 5.6% · 92nd percentile
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- 2026-08-06 13:43 UTCEPSS rescoreEPSS 5.6% · 92nd percentile
- 2026-08-06 05:54 UTCOSV refresh
- 2026-08-05 19:14 UTCEPSS rescoreEPSS 5.6% · 92nd percentile
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- 2026-07-25 14:14 UTCEPSS rescoreEPSS 5.6% · 92nd percentile
- 2026-07-24 14:14 UTCEPSS rescoreEPSS 5.6% · 92nd percentile
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownDebian:8:python2.7
- CVE-2019-9636EG 9.8EPSS p95CRITICAL
- CVE-2019-9948EG 9.1EPSS p96CRITICAL
- CVE-2019-5010EG 7.5EPSS p98HIGH
- CVE-2019-16056EG 7.5EPSS p92HIGH
- CVE-2018-14647EG 7.5EPSS p96HIGH
- CVE-2018-1061EG 7.5EPSS p92HIGH
- CVE-2018-1060EG 7.5EPSS p92HIGH
- CVE-2019-9740EG 6.1EPSS p93MEDIUM
- CVE-2018-20852EG 5.3EPSS p90MEDIUM
- CVE-2018-1000802EG 9.8EPSS p97CRITICAL
Same vendor
10 shownredhat:RHBA-2020:0547 · redhat:RHSA-2019:1260 · redhat:RHSA-2019:3725
- CVE-2019-9740EG 6.1EPSS p93MEDIUM
- CVE-2019-9948EG 9.1EPSS p96CRITICAL
- CVE-2018-14647EG 7.5EPSS p96HIGH
- CVE-2019-5010EG 7.5EPSS p98HIGH
- CVE-2018-1061EG 7.5EPSS p92HIGH
- CVE-2018-1060EG 7.5EPSS p92HIGH
- CVE-2018-20406EG 7.5EPSS p93HIGH
- CVE-2018-20852EG 5.3EPSS p90MEDIUM
- CVE-2019-10160EG 9.8EPSS p93CRITICAL
- CVE-2019-9636EG 9.8EPSS p95CRITICAL
Frequently asked(5)
What is CVE-2019-9947?
When was the CVE record for CVE-2019-9947 published?
Is CVE-2019-9947 actively exploited?
What is the CVSS score of CVE-2019-9947?
How do I remediate CVE-2019-9947?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2019-9947
Is Your Infrastructure Affected by CVE-2019-9947?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.