CVE-2026-44742

HIGHNVD 7.27.2
EchelonGraph scoreMEDIUM confidence

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

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, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week

Also known asEUVD-2026-28415 (ENISA EUVD) · GHSA-r7c9-7pjq-hmm8 (GitHub Security Advisories)Source: ENISA EUVD

7.2EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.2Exploit: None knownExposed services: Not assessed

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
7.2HIGHmedium confidence
EG Risk
47
EG Risk 47/100

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)
Severity72% × 45%
Impact severity (EG Severity): CVSS 7.2 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
14th
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 (7.2): severity, escalated by confirmed exploitation. This CVE's 7.2 is its impact severity (EG Severity), not escalated.

EG Severity
7.2 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). 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 low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days 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 low or medium mission impact; 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 (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (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

May 7, 2026

Last Modified

May 26, 2026

Advisory Details (3)

Auto-updated May 7, 2026
Patch available.
Web page

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

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

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

https://gitlab.com/mailman/postorius/-/merge_requests/972
Web page

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

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython3-django-postorius (1.2.4-1ubuntu0.1+esm1) @ focal2026-10-30ubuntu
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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
postorius1.3.4-2, 1.3.4-2+deb11u1
  • every version up to 1.3.4-2+deb11u2: fixed in 1.3.4-2+deb11u2
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
postorius1.3.8-3
  • every version up to 1.3.8-3+deb12u1: fixed in 1.3.8-3+deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
postorius1.3.13-1
  • every version up to 1.3.13-1+deb13u1: fixed in 1.3.13-1+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
postorius1.3.13-1, 1.3.13-2, 1.3.13-3
  • every version on: no fix on record
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
postorius1.0.0 ... 1.3.9 (37 versions)
  • every version through 1.3.13: no fix on record
—

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 14× in last 7d / 43× 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 100 of 296 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. None are among the latest 100 rows. The 196 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-10-30 11:26 UTCEG score recompute
  3. 2026-10-30 11:26 UTCVendor advisory
  4. 2026-10-30 11:26 UTCGHSA enrichmentGHSA-r7c9-7pjq-hmm8 · GitHub severity HIGH · GitHub CVSS 7.2
  5. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  6. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  7. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  8. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  9. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  10. 2026-10-25 14:27 UTCEG score recompute
  11. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  12. 2026-10-24 00:40 UTCEG score recompute
  13. 2026-10-24 00:40 UTCVendor advisory
  14. 2026-10-24 00:40 UTCGHSA enrichmentGHSA-r7c9-7pjq-hmm8 · GitHub severity HIGH · GitHub CVSS 7.2
  15. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  16. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  17. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  18. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  19. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  20. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  21. 2026-10-18 03:39 UTCEG score recompute
  22. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  23. 2026-10-17 13:53 UTCEG score recompute
  24. 2026-10-17 13:53 UTCGHSA enrichmentGHSA-r7c9-7pjq-hmm8 · GitHub severity HIGH · GitHub CVSS 7.2
  25. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.3% · 25th percentile
Show 75 more
  1. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  2. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  3. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  4. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  5. 2026-10-12 16:05 UTCEG score recompute
  6. 2026-10-11 19:47 UTCEG score recompute
  7. 2026-10-11 17:01 UTCEG score recompute
  8. 2026-10-11 14:27 UTCEG score recompute
  9. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  12. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  17. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  20. 2026-09-30 08:41 UTCOSV refresh
  21. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  23. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  24. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  25. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  26. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  27. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  28. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  29. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  30. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  31. 2026-09-11 15:23 UTCOSV refresh
  32. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  33. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  34. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  35. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  36. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  37. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  38. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  39. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  40. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  41. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  42. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  43. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  44. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  45. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  46. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  47. 2026-08-23 19:33 UTCEG score recompute
  48. 2026-08-23 19:33 UTCVendor advisory
  49. 2026-08-23 19:33 UTCGHSA enrichmentGHSA-r7c9-7pjq-hmm8 · GitHub severity HIGH · GitHub CVSS 7.2
  50. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  51. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  52. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  53. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  54. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  55. 2026-08-17 12:43 UTCEG score recompute
  56. 2026-08-17 12:43 UTCVendor advisory
  57. 2026-08-17 12:43 UTCGHSA enrichmentGHSA-r7c9-7pjq-hmm8 · GitHub severity HIGH · GitHub CVSS 7.2
  58. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  59. 2026-08-16 04:43 UTCEG score recompute
  60. 2026-08-16 04:43 UTCVendor advisory
  61. 2026-08-16 04:43 UTCGHSA enrichmentGHSA-r7c9-7pjq-hmm8 · GitHub severity HIGH · GitHub CVSS 7.2
  62. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  63. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  64. 2026-08-14 14:56 UTCVendor advisory
  65. 2026-08-14 14:56 UTCGHSA enrichmentGHSA-r7c9-7pjq-hmm8 · GitHub severity HIGH · GitHub CVSS 7.2
  66. 2026-08-14 03:18 UTCVendor advisory
  67. 2026-08-14 03:18 UTCGHSA enrichmentGHSA-r7c9-7pjq-hmm8 · GitHub severity HIGH · GitHub CVSS 7.2
  68. 2026-08-13 04:30 UTCVendor advisory
  69. 2026-08-13 04:30 UTCGHSA enrichmentGHSA-r7c9-7pjq-hmm8 · GitHub severity HIGH · GitHub CVSS 7.2
  70. 2026-08-12 16:52 UTCEG score recompute
  71. 2026-08-12 16:52 UTCVendor advisory
  72. 2026-08-12 16:52 UTCGHSA enrichmentGHSA-r7c9-7pjq-hmm8 · GitHub severity HIGH · GitHub CVSS 7.2
  73. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  74. 2026-08-11 15:55 UTCEG score recompute
  75. 2026-08-11 15:55 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-44742?
CVE-2026-44742 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-44742 published?
The CVE record for CVE-2026-44742 was published on May 7, 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 May 26, 2026; the record at its source may have been updated since.
Is CVE-2026-44742 actively exploited?
CVE-2026-44742 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (14th percentile of EPSS-scored CVEs).
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?
A fix for CVE-2026-44742 is available: update to the fixed version the vendor names in its advisory.

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