CVE-2026-100629

MEDIUMPre-NVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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

Score 5.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-26. A secondary CVSS source baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated

Also known asEUVD-2026-87723 (ENISA EUVD) · GHSA-56rm-j3fv-2h9m (GitHub Security Advisories)Source: ENISA EUVD

5.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.5Exploit: No code on recordExposed services: Not assessed

The CVE record names the fixed release — apply it.

Capgo (capgo.app backend) before 12.127.5 contains an authorization flaw in the PATCH /private/role_bindings/:binding_id endpoint. The handler verifies that the newly assigned role's priority rank does not exceed the caller's own rank, but — unlike the DELETE handler — it never checks the rank of the role currently bound to the target binding. An authenticated user holding the org_admin role (rank 90) can therefore change an org_super_admin binding (rank 95) to a lower-privileged role such as org_member (rank 75). Because the prevent_last_super_admin_binding_delete database trigger fires only BEFORE DELETE and not on UPDATE, an org_admin can demote every org_super_admin, leaving the organization with no super administrator. The issue is fixed in 12.127.5.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
41
EG Risk 41/100

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)
Severity55% × 45%
Impact severity (EG Severity): CVSS 5.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (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: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
26th
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 (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity
5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-25). 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; Track* at high (mission-essential systems).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 low or medium mission impact; Track* at high (mission-essential systems).

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation public PoC (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

September 26, 2026

Last Modified

October 5, 2026

Advisory Details (2)

Auto-updated Sep 26, 2026
Fix named in the CVE record. Sources: github.
Web page

Capgo backend before 12.127.5 Privilege Escalation via role_bindings PATCH | Advisories | VulnCheck

https://www.vulncheck.com/advisories/capgo-backend-before-12.127.5-privilege-escalation-via-role-bindings-patch
GitHub advisoryMentions a patch (unverified)

R - PATCH /role_bindings Missing Existing-Role Rank Check Allows org_admin to Demote org_super_admin · Advisory · Cap-go/capgo.app · GitHub

https://github.com/Cap-go/capgo.app/security/advisories/GHSA-54mj-q77q-xwx5

Vendor Advisories for CVE-2026-100629(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 58× 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 0.3% · 26th percentile
  2. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  3. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  4. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  5. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  6. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  7. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  8. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  9. 2026-10-26 15:33 UTCEG score recompute
  10. 2026-10-26 15:33 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  11. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  12. 2026-10-25 15:58 UTCEG score recompute
  13. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  14. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  15. 2026-10-23 09:53 UTCEG score recompute
  16. 2026-10-23 09:53 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  17. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  18. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  19. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  20. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  21. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  22. 2026-10-18 05:11 UTCEG score recompute
  23. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  24. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  25. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
Show 54 more
  1. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  2. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  3. 2026-10-12 16:41 UTCEG score recompute
  4. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  5. 2026-10-12 03:31 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  6. 2026-10-11 20:16 UTCEG score recompute
  7. 2026-10-11 18:29 UTCEG score recompute
  8. 2026-10-11 15:02 UTCEG score recompute
  9. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  10. 2026-10-11 01:24 UTCEG score recompute
  11. 2026-10-11 01:23 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  12. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  13. 2026-10-09 23:18 UTCEG score recompute
  14. 2026-10-09 23:18 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  15. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  16. 2026-10-08 21:40 UTCEG score recompute
  17. 2026-10-08 21:39 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  18. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  19. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  20. 2026-10-07 19:43 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  21. 2026-10-06 18:05 UTCEG score recompute
  22. 2026-10-06 18:05 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  23. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  24. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  25. 2026-10-05 16:28 UTCEG score recompute
  26. 2026-10-05 16:28 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  27. 2026-10-05 16:11 UTCEG score recompute
  28. 2026-10-05 16:11 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  29. 2026-10-05 08:00 UTCEG score recompute
  30. 2026-10-05 08:00 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  31. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  32. 2026-10-04 06:22 UTCEG score recompute
  33. 2026-10-04 06:22 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  34. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  35. 2026-10-03 04:45 UTCEG score recompute
  36. 2026-10-03 04:45 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  37. 2026-10-02 03:07 UTCEG score recompute
  38. 2026-10-02 03:07 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  39. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  40. 2026-10-01 01:25 UTCEG score recompute
  41. 2026-10-01 01:25 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  42. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  43. 2026-09-29 23:48 UTCEG score recompute
  44. 2026-09-29 23:48 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  45. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  46. 2026-09-28 20:58 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  47. 2026-09-28 17:58 UTCEG score recompute
  48. 2026-09-28 17:58 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  49. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  50. 2026-09-27 16:11 UTCEG score recompute
  51. 2026-09-27 16:11 UTCGHSA enrichmentGHSA-56rm-j3fv-2h9m · GitHub severity HIGH · GitHub CVSS 5.5
  52. 2026-09-26 14:34 UTCEG score recompute
  53. 2026-09-26 13:40 UTCEG score recomputeFirst assessed: 5.5 MEDIUM
  54. 2026-09-26 13:30 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-100629?
CVE-2026-100629 is a medium-severity vulnerability; its CVE record was published on September 26, 2026. Capgo (capgo.app backend) before 12.127.5 contains an authorization flaw in the PATCH /private/role_bindings/:binding_id endpoint. The handler verifies that the newly assigned role's priority rank does not exceed the caller's own rank, but — unlike the DELETE handler — it never checks the rank of…
When was CVE-2026-100629 made public?
CVE-2026-100629 was made public on September 10, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on September 26, 2026. EchelonGraph's copy of the record carries a last-modified date of October 5, 2026; the record at its source may have been updated since.
Is CVE-2026-100629 actively exploited?
CVE-2026-100629 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (26th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100629?
CVE-2026-100629 has a CVSS base score of 5.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-100629?
The CVE record for CVE-2026-100629 names the fix: "The issue is fixed in 12.127.5." The vendor advisories EchelonGraph has for CVE-2026-100629 are linked in the Vendor Advisories panel on this page.

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