CVE-2026-44722

MEDIUMPre-NVD 6.26.2
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 6.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1% (1st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
6.2EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 6.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

pyzipper is a replacement for Python's zipfile that can read and write AES encrypted zip files. Prior to 0.4.0, a Python operator precedence bug in pyzipper/zipfile_aes.py caused the AE-2 format to never be automatically selected during encryption, causing encrypted entries to be written in AE-1 format and exposing the plaintext CRC32 checksum in the ZIP header and, for unseekable zip archives, in the datadescripter section, allowing an attacker who possesses the archive to brute-force candidate plaintexts for small or low-entropy files by comparing CRC32 values. This issue is fixed in version 0.4.0.

CVSS v3
6.2
EG Score
6.2MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100

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)
Severity62% × 45%
Impact severity (EG Severity): CVSS 6.2 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 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
0.1%
EPSS %ILE
1st
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 (6.2): severity, escalated by confirmed exploitation. This CVE's 6.2 is its impact severity (EG Severity), not escalated.

EG Severity
6.2 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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: 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.

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

July 17, 2026

Last Modified

July 17, 2026

Advisory Details (2)

Auto-updated Jul 17, 2026
Patch available. Sources: github, github_commit.
GitHub commit

commit 93ce88e7dfd1 (danifus/pyzipper)

Fix landed in danifus/pyzipper commit 93ce88e7dfd1 — awaiting tagged release

https://github.com/danifus/pyzipper/commit/93ce88e7dfd1635443197dab3fb8d477cff579ae
GitHub advisoryMentions a patch (unverified)

CRC32 plaintext leakage in pyzipper encrypted entries · Advisory · danifus/pyzipper · GitHub

https://github.com/danifus/pyzipper/security/advisories/GHSA-crqm-m339-7m2p

Affected Packages

(3 across 3 ecosystems)
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
python-pyzipper0.3.6-5, 0.4.0-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
python-pyzipper0.3.6-5
  • every version up to 0.4.0-1: fixed in 0.4.0-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
pyzipper0.1.0 ... 0.3.6 (9 versions)
  • every version up to 0.4.0: fixed in 0.4.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 30× 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 102 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 3 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  4. 2026-10-18 03:39 UTCEG score recompute
  5. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  6. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  7. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  8. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  9. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  10. 2026-10-12 16:05 UTCEG score recompute
  11. 2026-10-11 19:47 UTCEG score recompute
  12. 2026-10-11 17:01 UTCEG score recompute
  13. 2026-10-11 14:27 UTCEG score recompute
  14. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  16. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  21. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  22. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  23. 2026-10-01 10:28 UTCEG score recompute
  24. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  25. 2026-09-28 07:53 UTCEG score recompute
Show 74 more
  1. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-09-24 04:35 UTCEG score recompute
  4. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  5. 2026-09-23 02:26 UTCEG score recompute
  6. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  7. 2026-09-18 09:55 UTCEG score recompute
  8. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  9. 2026-09-17 10:15 UTCEG score recompute
  10. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  11. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  12. 2026-09-14 03:58 UTCEG score recompute
  13. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  14. 2026-09-13 05:15 UTCEG score recompute
  15. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  16. 2026-09-11 21:06 UTCEG score recompute
  17. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  21. 2026-09-08 00:00 UTCEG score recompute
  22. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  23. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  24. 2026-09-05 20:26 UTCEG score recompute
  25. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  26. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  27. 2026-08-31 02:00 UTCEG score recompute
  28. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  29. 2026-08-30 03:17 UTCEG score recompute
  30. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  31. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  32. 2026-08-27 21:26 UTCEG score recompute
  33. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  34. 2026-08-26 22:36 UTCEG score recompute
  35. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  36. 2026-08-25 19:14 UTCEG score recompute
  37. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  38. 2026-08-24 20:31 UTCEG score recompute
  39. 2026-08-23 21:44 UTCEG score recompute
  40. 2026-08-23 00:19 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  41. 2026-08-22 00:18 UTCEG score recompute
  42. 2026-08-21 23:49 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  43. 2026-08-17 06:04 UTCEG score recompute
  44. 2026-08-16 14:56 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  45. 2026-08-15 08:30 UTCEG score recompute
  46. 2026-08-15 01:30 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  47. 2026-08-13 11:03 UTCEG score recompute
  48. 2026-08-12 13:51 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  49. 2026-08-08 17:28 UTCEG score recompute
  50. 2026-08-08 16:37 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  51. 2026-08-05 21:19 UTCEG score recompute
  52. 2026-08-05 19:17 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  53. 2026-08-04 22:35 UTCEG score recompute
  54. 2026-08-04 15:10 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  55. 2026-08-04 10:38 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  56. 2026-08-03 23:52 UTCEG score recompute
  57. 2026-08-03 10:36 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  58. 2026-08-02 02:26 UTCEG score recompute
  59. 2026-08-01 04:16 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  60. 2026-07-31 04:59 UTCEG score recompute
  61. 2026-07-30 16:28 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  62. 2026-07-29 07:32 UTCEG score recompute
  63. 2026-07-28 15:36 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  64. 2026-07-28 08:48 UTCEG score recompute
  65. 2026-07-27 14:13 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  66. 2026-07-27 10:02 UTCEG score recompute
  67. 2026-07-26 14:54 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  68. 2026-07-26 11:18 UTCEG score recompute
  69. 2026-07-25 14:18 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  70. 2026-07-24 14:17 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  71. 2026-07-23 14:18 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  72. 2026-07-23 03:15 UTCEG score recompute
  73. 2026-07-22 14:08 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  74. 2026-07-19 02:29 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-44722?
CVE-2026-44722 is a medium-severity vulnerability; its CVE record was published on July 17, 2026. pyzipper is a replacement for Python's zipfile that can read and write AES encrypted zip files. Prior to 0.4.0, a Python operator precedence bug in pyzipper/zipfile_aes.py caused the AE-2 format to never be automatically selected during encryption, causing encrypted entries to be written in AE-1…
When was the CVE record for CVE-2026-44722 published?
The CVE record for CVE-2026-44722 was published on July 17, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 17, 2026; the record at its source may have been updated since.
Is CVE-2026-44722 actively exploited?
CVE-2026-44722 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-44722?
CVE-2026-44722 has a CVSS base score of 6.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-44722?
A fix for CVE-2026-44722 is available: update to the fixed version the vendor names in its advisory.

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