MajorDoMo (aka Major Domestic Module) is vulnerable to unauthenticated remote code execution through supply chain compromise via update URL poisoning. The saverestore module exposes its admin() method through the /objects/?module=saverestore endpoint without authentication because it uses gr('mode') (which reads directly from $_REQUEST) instead of the framework's $this->mode. An attacker can poison the system update URL via the auto_update_settings mode handler, then trigger the force_update handler to initiate the update chain. The autoUpdateSystem() method fetches an Atom feed from the attacker-controlled URL with trivial validation, downloads a tarball via curl with TLS verification disabled (CURLOPT_SSL_VERIFYPEER set to FALSE), extracts it using exec('tar xzvf ...'), and copies all extracted files to the document root using copyTree(). This allows an attacker to deploy arbitrary PHP files, including webshells, to the webroot with two GET requests.
CVE-2026-27180
“—” beside the score: it is equal to the CVSS score beside it.
Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-02-19. The CNA's CVSS baseline 9.8; sources differ by 0.0.
Also known asEUVD-2026-8370 (ENISA EUVD) · GHSA-grp8-p6j9-9x5f (GitHub Security Advisories)Source: ENISA EUVD
- Public exploit code is available (Metasploit)
An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.
- CVSS v3
- 9.8
- EG Score
- 9.8CRITICALmedium confidence
- EG Risk
- 85EG Risk 85/100
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)Severity98% × 45%Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation65% × 40%EchelonGraph's fixed weight for EG-KEV Tier 2 (Weaponized): a constant, not a probability.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 total (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: An upstream fix is merged but not yet in a tagged release. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high, then apply it. - EPSS PROB
- 1.2%
- EPSS %ILE
- 68th
- 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 (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.
- EG Severity
- 9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 1.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). 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: 3 days if the affected system is publicly exposed; 60 days if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.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 low or medium mission impact; Attend at high (mission-essential systems).
An upstream fix is merged but not yet in a tagged release. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high, then apply it.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (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)3 days if the affected system is publicly exposed; 60 days if it is not.
No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (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
February 18, 2026
Last Modified
June 23, 2026
Advisory Details (3)
Auto-updated Oct 31, 2026MajorDoMo Supply Chain Remote Code Execution via Update URL Poisoning | Advisories | VulnCheck
https://www.vulncheck.com/advisories/majordomo-supply-chain-remote-code-execution-via-update-url-poisoningFix: 8 security vulnerabilities (3 RCE, 1 module uninstall, 1 SQLi, 2 stored XSS, 1 reflected XSS)
Fix merged in sergejey/majordomo PR #1177 on 2026-02-18 — awaiting tagged release
https://github.com/sergejey/majordomo/pull/1177MajorDoMo Revisited: What I Missed in 2023 - Chocapikk's Cybersecurity Blog
https://chocapikk.com/posts/2026/majordomo-revisited/Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 21× in last 7d / 78× 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 97 of 208 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. 3 repeat rows among the latest 100 are merged into the row they repeat. The 111 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-02 16:44 UTCEPSS rescoreEPSS 1.2% · 68th percentile
- 2026-11-02 04:04 UTCEG score recompute
- 2026-11-02 04:04 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-11-01 16:34 UTCEPSS rescoreEPSS 1.2% · 68th percentile
- 2026-11-01 04:57 UTCEG score recompute
- 2026-11-01 04:57 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-31 16:32 UTCEPSS rescoreEPSS 1.2% · 68th percentile
- 2026-10-31 05:51 UTCEG score recompute
- 2026-10-31 05:51 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-30 16:34 UTCEPSS rescoreEPSS 1.2% · 68th percentile
- 2026-10-30 06:46 UTCEG score recompute
- 2026-10-30 06:46 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-29 16:33 UTCEPSS rescoreEPSS 1.2% · 68th percentile
- 2026-10-29 07:40 UTCEG score recompute
- 2026-10-29 07:40 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-28 16:32 UTCEPSS rescoreEPSS 1.2% · 68th percentile
- 2026-10-28 08:35 UTCEG score recompute
- 2026-10-28 08:34 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-27 16:31 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-27 09:06 UTCEG score recompute
- 2026-10-27 09:06 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-26 16:31 UTCEPSS rescoreEPSS 1.2% · 67th percentile
- 2026-10-26 09:02 UTCEG score recompute
- 2026-10-26 09:02 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-25 16:32 UTCEPSS rescoreEPSS 1.2% · 67th percentile
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- 2026-10-25 14:39 UTCEG score recompute
- 2026-10-25 09:56 UTCEG score recompute
- 2026-10-25 09:56 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-24 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
- 2026-10-24 10:50 UTCEG score recompute
- 2026-10-24 10:50 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-23 16:31 UTCEPSS rescoreEPSS 1.3% · 69th percentile
- 2026-10-23 11:44 UTCEG score recompute
- 2026-10-23 11:44 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-22 16:34 UTCEPSS rescoreEPSS 1.3% · 69th percentile
- 2026-10-22 12:37 UTCEG score recompute
- 2026-10-22 12:37 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-21 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
- 2026-10-21 13:31 UTCEG score recompute
- 2026-10-21 13:31 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-20 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
- 2026-10-20 14:26 UTCEG score recompute
- 2026-10-20 14:26 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-19 16:31 UTCEPSS rescoreEPSS 1.3% · 69th percentile
- 2026-10-19 13:24 UTCEG score recompute
- 2026-10-19 13:24 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-18 16:31 UTCEPSS rescoreEPSS 1.3% · 69th percentile
- 2026-10-18 13:07 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-18 03:51 UTCEG score recompute
- 2026-10-17 16:33 UTCEPSS rescoreEPSS 1.3% · 69th percentile
- 2026-10-17 14:00 UTCEG score recompute
- 2026-10-17 14:00 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-16 16:41 UTCEPSS rescoreEPSS 1.3% · 69th percentile
- 2026-10-16 14:52 UTCEG score recompute
- 2026-10-16 14:52 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-15 16:31 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-15 15:45 UTCEG score recompute
- 2026-10-15 15:44 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-14 16:32 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-14 09:58 UTCEG score recompute
- 2026-10-14 09:58 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-13 16:33 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-13 08:02 UTCEG score recompute
- 2026-10-13 08:02 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-12 16:33 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-12 16:17 UTCEG score recompute
- 2026-10-12 08:53 UTCGHSA enrichmentGHSA-grp8-p6j9-9x5f · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-11 20:00 UTCEG score recompute
- 2026-10-11 17:13 UTCEG score recompute
- 2026-10-11 14:44 UTCEG score recompute
- 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.2% · 66th percentile
- 2026-10-08 17:11 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-10-07 23:47 UTCEPSS rescoreEPSS 1.2% · 65th percentile
- 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-05 17:42 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-04 23:21 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-01 19:49 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-26 00:26 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-20 20:15 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-18 19:27 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-17 19:30 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-16 14:08 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-13 16:47 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-12 15:01 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-11 14:52 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-10 09:34 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-08 22:00 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-04 05:06 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
Publicly available exploits
(1 reference)Public exploit code is referenced for this CVE (1 Metasploit module). The fix is not yet in a release, so defenders should restrict or isolate affected systems accordingly until it ships.
- Metasploitexploit/multi/http/majordomo_supply_chain_rce✓ verifiedPublished Mar 2, 2026
MajorDoMo Supply Chain RCE via Update Poisoning
Open source ↗
Related CVEs(same CWE)
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