CVE-2019-18348

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

Score 6.1 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
6.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 4%CVSS: 6.1Exploit: NoneExposed: 0

A fix is available — apply it.

An issue was discovered in urllib2 in Python 2.x through 2.7.17 and urllib in Python 3.x through 3.8.0. 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 host component of a URL) followed by an HTTP header. This is similar to the CVE-2019-9740 query string issue and the CVE-2019-9947 path string issue. (This is not exploitable when glibc has CVE-2016-10739 fixed.). This is fixed in: v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1; v3.6.11, v3.6.11rc1, v3.6.12; v3.7.8, v3.7.8rc1, v3.7.9; v3.8.3, v3.8.3rc1, v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
33(Track)
EG Risk 33/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity61% × 45%
Exploitation4% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
88.4%
KEV
Not listed

Published

October 23, 2019

Last Modified

November 21, 2024

References (26)

Vendor Advisories for CVE-2019-18348(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython3.4-venv (3.4.3-1ubuntu1~14.04.7+esm6) @ trusty2026-05-27ubuntu
ubuntupython3.8-venv (3.8.2-1ubuntu1.1) @ focal2026-05-27ubuntu
ubuntupython3.5-venv (3.5.2-2ubuntu0~16.04.13+esm13) @ xenial2026-05-27ubuntu
redhatpython27-python-virtualenv-0:13.1.0-4.el72020-10-20redhat
redhatrh-python36-python-virtualenv-0:15.1.0-3.el72020-10-19redhat

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.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(4)

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 15× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-07-23 01:42 UTCEG score recompute
  2. 2026-07-22 22:22 UTCEG score recompute
  3. 2026-07-22 14:05 UTCEPSS rescore
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  8. 2026-07-20 03:16 UTCOSV refresh
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  1. 2026-07-08 15:11 UTCEPSS rescore
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  7. 2026-07-02 18:05 UTCOSV refresh
  8. 2026-07-01 15:03 UTCEPSS rescore
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  35. 2026-06-14 15:43 UTCOSV refresh
  36. 2026-06-13 22:58 UTCEPSS rescore
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  38. 2026-06-11 13:58 UTCEPSS rescore
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  40. 2026-06-10 13:19 UTCEPSS rescore
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  58. 2026-05-29 13:42 UTCEPSS rescore
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  60. 2026-05-27 13:38 UTCEPSS rescore
  61. 2026-05-27 12:36 UTCEG score recompute
  62. 2026-05-27 12:36 UTCVendor advisory
  63. 2026-05-27 12:36 UTCGHSA enrichment
  64. 2026-05-26 13:42 UTCEPSS rescore
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  68. 2026-05-26 07:17 UTCEPSS rescore
  69. 2026-05-25 05:37 UTCOSV refresh

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2019-18348?
CVE-2019-18348 is a medium vulnerability published on October 23, 2019. An issue was discovered in urllib2 in Python 2.x through 2.7.17 and urllib in Python 3.x through 3.8.0. 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 host component of a URL)…
When was CVE-2019-18348 disclosed?
CVE-2019-18348 was first published in the National Vulnerability Database on October 23, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-18348 actively exploited?
CVE-2019-18348 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 88.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2019-18348?
CVE-2019-18348 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2019-18348?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-18348, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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