CVE-2019-15796

MEDIUMNVD 4.74.7—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.7 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 60% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
4.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 4.7Exploit: None knownExposed: 0

A fix is available — apply it.

Python-apt doesn't check if hashes are signed in Version.fetch_binary() and Version.fetch_source() of apt/package.py or in _fetch_archives() of apt/cache.py in version 1.9.3ubuntu2 and earlier. This allows downloads from unsigned repositories which shouldn't be allowed and has been fixed in verisions 1.9.5, 1.9.0ubuntu1.2, 1.6.5ubuntu0.1, 1.1.0~beta1ubuntu0.16.04.7, 0.9.3.5ubuntu3+esm2, and 0.8.3ubuntu7.5.

CVSS v3
4.7
EG Score
4.7(medium)
EG Risk
26(Track)
EG Risk 26/100SSVC: 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
Severity47% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

March 26, 2020

Last Modified

November 21, 2024

References (4)

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython3-apt (1.1.0~beta1ubuntu0.16.04.7) @ xenial2026-05-27ubuntu
ubuntupython3-apt (0.9.3.5ubuntu3+esm2) @ trusty2026-05-27ubuntu

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

(8 across 8 ecosystems)
Debian:10(1)
PackageVulnerable rangeFixed inDependents
python-apt1.8.41.8.4.1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
python-apt—1.8.5—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
python-apt—1.8.5—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
python-apt—1.8.5—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
python-apt—1.8.5—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
python-apt0.9.3.11, 0.9.3.120.9.3.13—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
python-apt1.4.0~beta31.4.1—
PyPI(1)
PackageVulnerable rangeFixed inDependents
python-apt—1.9.5—

Weakness Classification(2)

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

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 6× in last 7d / 25× 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 148 total refreshes for this CVE.

  1. 2026-09-18 19:22 UTCEPSS rescore
  2. 2026-09-17 19:22 UTCEPSS rescore
  3. 2026-09-16 14:04 UTCEPSS rescore
  4. 2026-09-15 03:05 UTCEPSS rescore
  5. 2026-09-13 16:42 UTCEPSS rescore
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  9. 2026-09-07 15:57 UTCEPSS rescore
  10. 2026-09-07 15:53 UTCOSV refresh
  11. 2026-09-06 13:44 UTCEPSS rescore
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  23. 2026-08-21 23:45 UTCEPSS rescore
  24. 2026-08-21 01:09 UTCOSV refresh
  25. 2026-08-20 22:51 UTCEPSS rescore
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  1. 2026-08-19 17:00 UTCEPSS rescore
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  5. 2026-08-16 02:10 UTCEPSS rescore
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  7. 2026-08-13 21:56 UTCEPSS rescore
  8. 2026-08-12 13:47 UTCEPSS rescore
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  10. 2026-08-08 16:33 UTCEPSS rescore
  11. 2026-08-07 16:23 UTCEPSS rescore
  12. 2026-08-06 13:43 UTCEPSS rescore
  13. 2026-08-05 19:13 UTCEPSS rescore
  14. 2026-08-05 16:41 UTCOSV refresh
  15. 2026-08-04 15:05 UTCEPSS rescore
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  20. 2026-07-30 16:24 UTCEPSS rescore
  21. 2026-07-30 01:27 UTCEPSS rescore
  22. 2026-07-28 15:32 UTCEPSS rescore
  23. 2026-07-26 14:51 UTCEPSS rescore
  24. 2026-07-25 14:14 UTCEPSS rescore
  25. 2026-07-24 14:14 UTCEPSS rescore
  26. 2026-07-24 14:14 UTCEPSS rescore
  27. 2026-07-23 14:15 UTCEPSS rescore
  28. 2026-07-23 01:40 UTCEG score recompute
  29. 2026-07-22 22:20 UTCEG score recompute
  30. 2026-07-22 14:05 UTCEPSS rescore
  31. 2026-07-21 15:22 UTCEPSS rescore
  32. 2026-07-21 15:22 UTCEPSS rescore
  33. 2026-07-20 17:04 UTCEPSS rescore
  34. 2026-07-19 15:29 UTCOSV refresh
  35. 2026-07-19 14:28 UTCEPSS rescore
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  37. 2026-07-19 02:26 UTCEPSS rescore
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  40. 2026-07-16 16:59 UTCEPSS rescore
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  43. 2026-07-13 22:27 UTCEPSS rescore
  44. 2026-07-13 06:10 UTCEPSS rescore
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  46. 2026-07-12 05:43 UTCEPSS rescore
  47. 2026-07-11 08:24 UTCEPSS rescore
  48. 2026-07-09 19:06 UTCEPSS rescore
  49. 2026-07-08 15:11 UTCEPSS rescore
  50. 2026-07-07 13:42 UTCEPSS rescore
  51. 2026-07-06 16:25 UTCEPSS rescore
  52. 2026-07-06 02:20 UTCEPSS rescore
  53. 2026-07-05 02:27 UTCEPSS rescore
  54. 2026-07-04 06:28 UTCEPSS rescore
  55. 2026-07-04 06:28 UTCEPSS rescore
  56. 2026-07-02 16:56 UTCEPSS rescore
  57. 2026-07-02 03:17 UTCOSV refresh
  58. 2026-07-01 15:03 UTCEPSS rescore
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  60. 2026-06-30 23:20 UTCEPSS rescore
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  74. 2026-06-22 14:23 UTCEPSS rescore
  75. 2026-06-22 14:23 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2019-15796?
CVE-2019-15796 is a medium vulnerability published on March 26, 2020. Python-apt doesn't check if hashes are signed in Version.fetchbinary() and Version.fetchsource() of apt/package.py or in fetcharchives() of apt/cache.py in version 1.9.3ubuntu2 and earlier. This allows downloads from unsigned repositories which shouldn't be allowed and has been fixed in verisions…
When was CVE-2019-15796 disclosed?
CVE-2019-15796 was first published in the National Vulnerability Database on March 26, 2020, 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-2019-15796 actively exploited?
CVE-2019-15796 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 57.6% of all scored CVEs.
What is the CVSS score of CVE-2019-15796?
CVE-2019-15796 has a CVSS v3 base score of 4.7 (NVD).
How do I remediate CVE-2019-15796?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-15796, 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.

Dependency Blast Radius

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