CVE-2026-104733

HIGHPre-NVD 7.47.4
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (11th 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
Trending — 3 sources updated this week

Also known asEUVD-2026-91582 (ENISA EUVD) · GHSA-339c-8fr4-g2w4 (GitHub Security Advisories)Source: ENISA EUVD

7.4EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Fixed versions, as the CVE record's CNA (Switzerland National Cyber Security Centre (NCSC)) states them: "Update to the latest version of ejabberd (26.07)".

User Impersonation in ProcessOnes XMMP Server ejabberd <= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism.

CVSS v3
7.4
EG Score
7.4HIGHmedium confidence
EG Risk
33
EG Risk 33/100

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)
Severity74% × 45%
Impact severity (EG Severity): CVSS 7.4 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.
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
0.2%
EPSS %ILE
11th
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 (7.4): severity, escalated by confirmed exploitation. This CVE's 7.4 is its impact severity (EG Severity), not escalated.

EG Severity
7.4 HIGHCVSS-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
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). 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, and whom BOD 26-04 binds: 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.

The score's inputs: 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

October 2, 2026

Last Modified

October 2, 2026

Advisory Details (2)

Auto-updated Oct 2, 2026
Patch available.
Web page

Releases · processone/ejabberd · GitHub

https://github.com/processone/ejabberd/releases#release-26.07
Web page

User Impersonation/Authorization Bypass in XMPP Server ejabberd | NSIDE ATTACK LOGIC

https://www.nsideattacklogic.de/advisories/NSIDE-SA-2026-004/

Vendor Advisories for CVE-2026-104733(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
ejabberd23.01-1 ... 26.07-1 (12 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
ejabberd24.12-3 ... 26.07-1 (6 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
ejabberd24.12-3, 24.12-4, 26.02-1
  • every version up to 26.07-1: fixed in 26.07-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 67× 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.

  1. 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  3. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  4. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  5. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  6. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  7. 2026-10-27 20:11 UTCEG score recompute
  8. 2026-10-27 20:11 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  9. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  10. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  11. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  12. 2026-10-25 14:55 UTCEG score recompute
  13. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  17. 2026-10-20 19:14 UTCEG score recompute
  18. 2026-10-20 19:14 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  19. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  21. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  22. 2026-10-18 05:09 UTCEG score recompute
  23. 2026-10-17 19:39 UTCEG score recompute
  24. 2026-10-17 19:38 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  25. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
Show 55 more
  1. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  3. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  4. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  5. 2026-10-12 16:40 UTCEG score recompute
  6. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  7. 2026-10-12 01:42 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  8. 2026-10-11 20:15 UTCEG score recompute
  9. 2026-10-11 18:27 UTCEG score recompute
  10. 2026-10-11 14:34 UTCEG score recompute
  11. 2026-10-11 14:34 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  12. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  13. 2026-10-11 03:26 UTCEG score recompute
  14. 2026-10-11 03:26 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  15. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-10-10 16:16 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  17. 2026-10-10 05:08 UTCEG score recompute
  18. 2026-10-10 05:07 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  19. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  20. 2026-10-09 17:59 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  21. 2026-10-09 06:51 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  22. 2026-10-08 19:43 UTCEG score recompute
  23. 2026-10-08 19:43 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  24. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  25. 2026-10-08 07:56 UTCEG score recompute
  26. 2026-10-08 07:56 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  27. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  28. 2026-10-07 20:48 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  29. 2026-10-07 09:34 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  30. 2026-10-06 22:26 UTCEG score recompute
  31. 2026-10-06 22:26 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  32. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  33. 2026-10-06 11:18 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  34. 2026-10-06 00:11 UTCEG score recompute
  35. 2026-10-06 00:11 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  36. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  37. 2026-10-05 13:03 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  38. 2026-10-05 01:54 UTCEG score recompute
  39. 2026-10-05 01:54 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  40. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  41. 2026-10-04 14:46 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  42. 2026-10-04 03:38 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  43. 2026-10-03 16:30 UTCEG score recompute
  44. 2026-10-03 16:30 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  45. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  46. 2026-10-03 05:23 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  47. 2026-10-02 18:15 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  48. 2026-10-02 18:14 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  49. 2026-10-02 17:29 UTCEG score recompute
  50. 2026-10-02 17:29 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  51. 2026-10-02 17:00 UTCEG score recompute
  52. 2026-10-02 17:00 UTCGHSA enrichmentGHSA-339c-8fr4-g2w4 · GitHub severity HIGH
  53. 2026-10-02 13:18 UTCEG score recompute
  54. 2026-10-02 12:46 UTCEG score recomputeFirst assessed: 7.4 HIGH
  55. 2026-10-02 12:45 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-104733?
CVE-2026-104733 is a high-severity vulnerability; its CVE record was published on October 2, 2026. User Impersonation in ProcessOnes XMMP Server ejabberd <= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism.
When was CVE-2026-104733 made public?
CVE-2026-104733 was made public on July 31, 2026: that is the date its CVE record's CNA, Switzerland National Cyber Security Centre (NCSC), gives for when the vulnerability was made public. The CVE record itself was published on October 2, 2026. EchelonGraph's copy of the record carries a last-modified date of October 2, 2026; the record at its source may have been updated since.
Is CVE-2026-104733 actively exploited?
CVE-2026-104733 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (11th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-104733?
CVE-2026-104733 has a CVSS base score of 7.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-104733?
A fix for CVE-2026-104733 is available: update to the fixed version the vendor names in its advisory. Fixed versions, as the CVE record's CNA (Switzerland National Cyber Security Centre (NCSC)) states them: "Update to the latest version of ejabberd (26.07)". The vendor advisories EchelonGraph has for CVE-2026-104733 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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