CVE-2019-16056

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 5.4%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

An issue was discovered in Python through 2.7.16, 3.x through 3.5.7, 3.6.x through 3.6.9, and 3.7.x through 3.7.4. The email module wrongly parses email addresses that contain multiple @ characters. An application that uses the email module and implements some kind of checks on the From/To headers of a message could be tricked into accepting an email address that should be denied. An attack may be the same as in CVE-2019-11340; however, this CVE applies to Python more generally.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
40
EG Risk 40/100CISA SSVC

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
Severity75% × 45%
Exploitation5% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
5.4%
EPSS %ILE
92nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 6, 2019

Last Modified

November 21, 2024

References (68)

Vendor Advisories for CVE-2019-16056(4)

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

Patch Availability(12)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython3.11-venv (3.11.0~rc1-1~22.04.1~esm1) @ jammy2026-05-27ubuntu
ubuntupython3.5-venv (3.5.2-2ubuntu0~16.04.9) @ xenial2026-05-27ubuntu
ubuntulibpython3.4 (3.4.3-1ubuntu1~14.04.7+esm4) @ trusty2026-05-27ubuntu
redhatpython-0:2.7.5-87.el7_72020-06-12redhat
redhatpython27:2.7-8020020200117110429.90f98d4f2020-04-28redhat
redhatpython3-0:3.6.8-23.el82020-04-28redhat
redhatansible-tower-36/ansible-tower:3.6.4-12020-04-22redhat
redhatansible-tower-35/ansible-tower:3.5.6-12020-04-22redhat
redhatpython-0:2.7.5-88.el72020-03-31redhat
redhatpython3-0:3.6.8-13.el72020-03-31redhat
redhatpython27-python-0:2.7.17-2.el72019-11-25redhat
redhatrh-python36-python-0:3.6.9-2.el72019-11-06redhat

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

(25 across 21 ecosystems)
Alpine:v3.11(2)
PackageVulnerable rangeFix by version rangeDependents
python2—
  • every version up to 2.7.16-r3: fixed in 2.7.16-r3
—
python3—
  • every version up to 3.7.5-r0: fixed in 3.7.5-r0
—
Alpine:v3.12(2)
PackageVulnerable rangeFix by version rangeDependents
python2—
  • every version up to 2.7.16-r3: fixed in 2.7.16-r3
—
python3—
  • every version up to 3.7.5-r0: fixed in 3.7.5-r0
—
Debian:8(2)
PackageVulnerable rangeFix by version rangeDependents
python2.72.7.9-2, 2.7.9-2+deb8u1, 2.7.9-2+deb8u2, 2.7.9-2+deb8u3, 2.7.9-2+deb8u4
  • every version up to 2.7.9-2+deb8u5: fixed in 2.7.9-2+deb8u5
—
python3.43.4.2-1 ... 3.4.2-1+deb8u6 (7 versions)
  • every version up to 3.4.2-1+deb8u7: fixed in 3.4.2-1+deb8u7
—
Debian:9(2)
PackageVulnerable rangeFix by version rangeDependents
python2.72.7.13-2, 2.7.13-2+deb9u1, 2.7.13-2+deb9u2, 2.7.13-2+deb9u3
  • every version up to 2.7.13-2+deb9u4: fixed in 2.7.13-2+deb9u4
—
python3.53.5.3-1, 3.5.3-1+deb9u1
  • every version up to 3.5.3-1+deb9u2: fixed in 3.5.3-1+deb9u2
—
Alpine:v3.10(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.7.5-r0: fixed in 3.7.5-r0
—
Alpine:v3.13(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.7.5-r0: fixed in 3.7.5-r0
—
Alpine:v3.14(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.7.5-r0: fixed in 3.7.5-r0
—
Alpine:v3.15(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.7.5-r0: fixed in 3.7.5-r0
—
Alpine:v3.16(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.7.5-r0: fixed in 3.7.5-r0
—
Alpine:v3.17(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.7.5-r0: fixed in 3.7.5-r0
—
Alpine:v3.18(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.7.5-r0: fixed in 3.7.5-r0
—
Alpine:v3.19(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.7.5-r0: fixed in 3.7.5-r0
—
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.7.5-r0: fixed in 3.7.5-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.7.5-r0: fixed in 3.7.5-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.7.5-r0: fixed in 3.7.5-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.7.5-r0: fixed in 3.7.5-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.7.5-r0: fixed in 3.7.5-r0
—
Alpine:v3.7(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.6.8-r1: fixed in 3.6.8-r1
—
Alpine:v3.8(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.6.8-r1: fixed in 3.6.8-r1
—
Alpine:v3.9(1)
PackageVulnerable rangeFix by version rangeDependents
python3—
  • every version up to 3.6.9-r1: fixed in 3.6.9-r1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
python2.7—
  • every version up to 2.7.17~rc1-1: fixed in 2.7.17~rc1-1
—

Additional Vendor Advisories

(8)

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 4× in last 7d / 22× 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.

Showing the most recent 100 of 154 total refreshes for this CVE.

  1. 2026-10-05 17:39 UTCEPSS rescore
  2. 2026-10-03 14:21 UTCEPSS rescore
  3. 2026-09-30 14:59 UTCEPSS rescore
  4. 2026-09-30 10:13 UTCEG score recompute
  5. 2026-09-28 13:46 UTCEPSS rescore
  6. 2026-09-27 19:50 UTCOSV refresh
  7. 2026-09-27 13:40 UTCEPSS rescore
  8. 2026-09-26 15:53 UTCEPSS rescore
  9. 2026-09-26 00:20 UTCEPSS rescore
  10. 2026-09-24 13:59 UTCEPSS rescore
  11. 2026-09-23 13:43 UTCEPSS rescore
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  20. 2026-09-08 21:55 UTCEPSS rescore
  21. 2026-09-08 04:52 UTCOSV refresh
  22. 2026-09-06 13:44 UTCEPSS rescore
  23. 2026-09-05 15:24 UTCEPSS rescore
  24. 2026-09-04 13:56 UTCEPSS rescore
  25. 2026-09-04 05:02 UTCEPSS rescore
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  1. 2026-09-02 14:07 UTCEPSS rescore
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  3. 2026-08-30 19:13 UTCEPSS rescore
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  5. 2026-08-28 21:36 UTCEPSS rescore
  6. 2026-08-27 14:21 UTCEPSS rescore
  7. 2026-08-26 14:42 UTCEPSS rescore
  8. 2026-08-25 13:45 UTCEPSS rescore
  9. 2026-08-21 23:45 UTCEPSS rescore
  10. 2026-08-21 15:14 UTCOSV refresh
  11. 2026-08-20 22:51 UTCEPSS rescore
  12. 2026-08-19 17:00 UTCEPSS rescore
  13. 2026-08-18 13:44 UTCEPSS rescore
  14. 2026-08-17 13:43 UTCEPSS rescore
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  18. 2026-08-13 21:56 UTCEPSS rescore
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  20. 2026-08-09 13:43 UTCEPSS rescore
  21. 2026-08-08 16:33 UTCEPSS rescore
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  23. 2026-08-06 13:43 UTCEPSS rescore
  24. 2026-08-06 01:21 UTCOSV refresh
  25. 2026-08-05 19:13 UTCEPSS rescore
  26. 2026-08-04 15:05 UTCEPSS rescore
  27. 2026-08-04 10:33 UTCEPSS rescore
  28. 2026-08-03 10:31 UTCEPSS rescore
  29. 2026-08-02 02:23 UTCEPSS rescore
  30. 2026-08-01 04:12 UTCEPSS rescore
  31. 2026-07-30 16:24 UTCEPSS rescore
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  37. 2026-07-23 14:15 UTCEPSS rescore
  38. 2026-07-23 01:41 UTCEG score recompute
  39. 2026-07-22 22:20 UTCEG score recompute
  40. 2026-07-22 14:05 UTCEPSS rescore
  41. 2026-07-21 15:22 UTCEPSS rescore
  42. 2026-07-21 15:22 UTCEPSS rescore
  43. 2026-07-20 17:04 UTCEPSS rescore
  44. 2026-07-20 07:04 UTCOSV refresh
  45. 2026-07-19 14:28 UTCEPSS rescore
  46. 2026-07-19 14:28 UTCEPSS rescore
  47. 2026-07-19 02:26 UTCEPSS rescore
  48. 2026-07-19 02:26 UTCEPSS rescore
  49. 2026-07-18 10:01 UTCEPSS rescore
  50. 2026-07-16 16:59 UTCEPSS rescore
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  63. 2026-07-04 06:28 UTCEPSS rescore
  64. 2026-07-04 06:28 UTCEPSS rescore
  65. 2026-07-03 00:35 UTCOSV refresh
  66. 2026-07-02 16:56 UTCEPSS rescore
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  68. 2026-07-01 15:03 UTCEPSS rescore
  69. 2026-06-30 23:20 UTCEPSS rescore
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  74. 2026-06-27 03:06 UTCEPSS rescore
  75. 2026-06-27 03:06 UTCEPSS rescore

Related CVEs(same product + same vendor)

Frequently asked(5)

What is CVE-2019-16056?
CVE-2019-16056 is a high vulnerability published on September 6, 2019. An issue was discovered in Python through 2.7.16, 3.x through 3.5.7, 3.6.x through 3.6.9, and 3.7.x through 3.7.4. The email module wrongly parses email addresses that contain multiple @ characters. An application that uses the email module and implements some kind of checks on the From/To headers…
When was CVE-2019-16056 disclosed?
CVE-2019-16056 was first published on September 6, 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-2019-16056 actively exploited?
CVE-2019-16056 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.4% probability of exploitation in the next 30 days (92nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2019-16056?
CVE-2019-16056 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2019-16056?
A fix for CVE-2019-16056 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2019-16056 are linked in the Vendor Advisories panel on this page.

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