CVE-2026-44742

HIGHNVD 7.27.2—
EchelonGraph scoreMEDIUM confidence

Score 7.2 from GitHub Security Advisory (severity: HIGH) published 2026-05-07. NVD baseline CVSS 7.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.2
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.2Exploit: NoneExposed: 0

A fix is available — apply it.

Postorius through 1.3.13 does not escape HTML in the message subject when rendering it in the Held messages pop-up, as exploited in the wild in May 2026.

CVSS v3
7.2
EG Score
7.2(medium)
EG Risk
47(Track)
EG Risk 47/100SSVC: 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
Severity72% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
14.8%
KEV
Not listed

Published

May 7, 2026

Last Modified

May 26, 2026

Advisory Details (3)

Auto-updated May 7, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

oss-security - XSS in Postorius (Mailman 3) 1.3.13 and earlier

https://www.openwall.com/lists/oss-security/2026/05/07/3
generic

Fixing held_messages.js (!972) · Merge requests · GNU Mailman / Postorius · GitLab

https://gitlab.com/mailman/postorius/-/merge_requests/972
generic

Merge branch 'xss-held-messages' into 'master' (c4706abd) · Commits · GNU Mailman / Postorius · GitLab

https://gitlab.com/mailman/postorius/-/commit/c4706abd05ba6bcf472fc674b160d3a9d6a4868b

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython3-django-postorius (1.2.4-1ubuntu0.1+esm1) @ focal2026-06-28ubuntu
pippostorius—ghsa

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

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
postorius1.0.0 ... 1.3.9 (37 versions)——

Weakness Classification(1)

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

All Vendor Advisories

(1)

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 8× in last 7d / 41× 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 139 total refreshes for this CVE.

  1. 2026-07-23 14:18 UTCEPSS rescore
  2. 2026-07-23 03:15 UTCEG score recompute
  3. 2026-07-22 14:08 UTCEPSS rescore
  4. 2026-07-21 15:24 UTCEPSS rescore
  5. 2026-07-20 17:08 UTCEPSS rescore
  6. 2026-07-19 14:31 UTCEPSS rescore
  7. 2026-07-19 02:29 UTCEPSS rescore
  8. 2026-07-18 10:04 UTCEPSS rescore
  9. 2026-07-16 17:03 UTCEPSS rescore
  10. 2026-07-16 09:53 UTCOSV refresh
  11. 2026-07-15 16:57 UTCEPSS rescore
  12. 2026-07-15 02:00 UTCEPSS rescore
  13. 2026-07-13 22:30 UTCEPSS rescore
  14. 2026-07-13 06:13 UTCEPSS rescore
  15. 2026-07-12 05:46 UTCEPSS rescore
  16. 2026-07-11 08:27 UTCEPSS rescore
  17. 2026-07-09 19:10 UTCEPSS rescore
  18. 2026-07-08 15:16 UTCEPSS rescore
  19. 2026-07-07 13:46 UTCEPSS rescore
  20. 2026-07-06 16:27 UTCEPSS rescore
  21. 2026-07-06 02:23 UTCEPSS rescore
  22. 2026-07-05 02:30 UTCEPSS rescore
  23. 2026-07-04 06:31 UTCEPSS rescore
  24. 2026-07-01 15:07 UTCEPSS rescore
  25. 2026-06-30 23:22 UTCEPSS rescore
Show 75 more
  1. 2026-06-29 14:06 UTCEPSS rescore
  2. 2026-06-29 14:06 UTCEPSS rescore
  3. 2026-06-28 14:07 UTCEPSS rescore
  4. 2026-06-28 09:09 UTCVendor advisory
  5. 2026-06-28 09:09 UTCGHSA enrichment
  6. 2026-06-28 04:56 UTCEPSS rescore
  7. 2026-06-28 04:56 UTCEPSS rescore
  8. 2026-06-27 14:19 UTCVendor advisory
  9. 2026-06-27 14:19 UTCGHSA enrichment
  10. 2026-06-27 03:08 UTCEPSS rescore
  11. 2026-06-26 22:13 UTCVendor advisory
  12. 2026-06-26 22:13 UTCGHSA enrichment
  13. 2026-06-25 13:49 UTCEPSS rescore
  14. 2026-06-25 13:49 UTCEPSS rescore
  15. 2026-06-24 14:05 UTCEPSS rescore
  16. 2026-06-23 21:33 UTCEPSS rescore
  17. 2026-06-22 14:25 UTCEPSS rescore
  18. 2026-06-22 14:25 UTCEPSS rescore
  19. 2026-06-21 14:56 UTCEPSS rescore
  20. 2026-06-21 14:56 UTCEPSS rescore
  21. 2026-06-21 01:59 UTCEPSS rescore
  22. 2026-06-19 19:25 UTCEPSS rescore
  23. 2026-06-18 17:52 UTCEPSS rescore
  24. 2026-06-18 17:52 UTCEPSS rescore
  25. 2026-06-17 17:53 UTCEPSS rescore
  26. 2026-06-17 03:35 UTCVendor advisory
  27. 2026-06-17 03:35 UTCGHSA enrichment
  28. 2026-06-16 17:52 UTCEPSS rescore
  29. 2026-06-15 17:49 UTCEPSS rescore
  30. 2026-06-15 03:29 UTCVendor advisory
  31. 2026-06-15 03:29 UTCGHSA enrichment
  32. 2026-06-14 15:50 UTCVendor advisory
  33. 2026-06-14 15:50 UTCGHSA enrichment
  34. 2026-06-14 03:32 UTCGHSA enrichment
  35. 2026-06-13 23:00 UTCEPSS rescore
  36. 2026-06-12 23:12 UTCEPSS rescore
  37. 2026-06-12 23:12 UTCEPSS rescore
  38. 2026-06-12 21:29 UTCVendor advisory
  39. 2026-06-12 21:29 UTCGHSA enrichment
  40. 2026-06-12 09:05 UTCVendor advisory
  41. 2026-06-12 09:05 UTCGHSA enrichment
  42. 2026-06-11 21:25 UTCVendor advisory
  43. 2026-06-11 21:25 UTCGHSA enrichment
  44. 2026-06-11 14:00 UTCEPSS rescore
  45. 2026-06-11 09:47 UTCVendor advisory
  46. 2026-06-11 09:47 UTCGHSA enrichment
  47. 2026-06-10 22:18 UTCEPSS rescore
  48. 2026-06-10 22:09 UTCVendor advisory
  49. 2026-06-10 22:09 UTCGHSA enrichment
  50. 2026-06-10 13:22 UTCEPSS rescore
  51. 2026-06-10 13:22 UTCEPSS rescore
  52. 2026-06-10 10:31 UTCVendor advisory
  53. 2026-06-10 10:31 UTCGHSA enrichment
  54. 2026-06-09 22:51 UTCVendor advisory
  55. 2026-06-09 22:51 UTCGHSA enrichment
  56. 2026-06-09 09:36 UTCVendor advisory
  57. 2026-06-09 09:36 UTCGHSA enrichment
  58. 2026-06-08 21:57 UTCVendor advisory
  59. 2026-06-08 21:57 UTCGHSA enrichment
  60. 2026-06-08 14:17 UTCEPSS rescore
  61. 2026-06-08 14:17 UTCEPSS rescore
  62. 2026-06-08 03:54 UTCVendor advisory
  63. 2026-06-08 03:54 UTCGHSA enrichment
  64. 2026-06-07 16:16 UTCVendor advisory
  65. 2026-06-07 16:16 UTCGHSA enrichment
  66. 2026-06-07 15:25 UTCEPSS rescore
  67. 2026-06-07 15:25 UTCEPSS rescore
  68. 2026-06-07 04:38 UTCGHSA enrichment
  69. 2026-06-06 17:00 UTCVendor advisory
  70. 2026-06-06 17:00 UTCGHSA enrichment
  71. 2026-06-06 13:47 UTCEPSS rescore
  72. 2026-06-06 13:47 UTCEPSS rescore
  73. 2026-06-06 05:22 UTCGHSA enrichment
  74. 2026-06-05 22:47 UTCEPSS rescore
  75. 2026-06-05 17:44 UTCVendor advisory

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-44742?
CVE-2026-44742 is a high vulnerability published on May 7, 2026. Postorius through 1.3.13 does not escape HTML in the message subject when rendering it in the Held messages pop-up, as exploited in the wild in May 2026.
When was CVE-2026-44742 disclosed?
CVE-2026-44742 was first published in the National Vulnerability Database on May 7, 2026, with the most recent update on May 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44742 actively exploited?
CVE-2026-44742 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-44742?
CVE-2026-44742 has a CVSS v3 base score of 7.2 (NVD).
How do I remediate CVE-2026-44742?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44742, 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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