CVE-2026-116187

MEDIUMPre-NVD 5.05.0
EchelonGraph scoreHIGH confidence

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

Score 5.0 from GitHub Security Advisory (severity: MODERATE) published 2026-10-25. A secondary CVSS source baseline 5.0; sources differ by 0.0.

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

Also known asEUVD-2026-109445 (ENISA EUVD) · GHSA-8qg9-895h-w83f (GitHub Security Advisories)Source: ENISA EUVD

5.0EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Rclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 --auth-proxy that allows authenticated tenants to manipulate other tenants' multipart uploads by referencing their upload IDs. Attackers who learn a victim's bucket, object, and upload ID can inject parts, complete, or abort in-flight uploads and view upload and object metadata across tenants.

CVSS v3
5.0
EG Score
5.0MEDIUMhigh confidence
EG Risk
23
EG Risk 23/100

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)
Severity50% × 45%
Impact severity (EG Severity): CVSS 5.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 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
0.1%
EPSS %ILE
3rd
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 (5.0): severity, escalated by confirmed exploitation. This CVE's 5.0 is its impact severity (EG Severity), not escalated.

EG Severity
5.0 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-10). 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 25, 2026

Last Modified

October 28, 2026

Advisory Details (2)

Auto-updated Oct 25, 2026
Patch available. Sources: github.
Web page

Rclone v1.68.0 before v1.75.2 Authorization Bypass in serve s3 Multipart Uploads | Advisories | VulnCheck

https://www.vulncheck.com/advisories/rclone-1.68.0-before-1.75.2-authorization-bypass-in-serve-s3-multipart-uploads
GitHub advisoryMentions a patch (unverified)

serve s3 --auth-proxy: multipart upload operations are not scoped to the authenticated tenant · Advisory · rclone/rclone · GitHub

https://github.com/rclone/rclone/security/advisories/GHSA-35g6-9fjv-rmx5

Vendor Advisories for CVE-2026-116187(1)

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

Affected Packages

(1 across 1 ecosystem)
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
rclone—
  • 1.68.0 up to 1.75.2-r0: fixed in 1.75.2-r0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 25× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  3. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-11-11 06:52 UTCEchelonGraph re-scored
  5. 2026-11-11 06:52 UTCGHSA enrichmentGHSA-8qg9-895h-w83f · GitHub severity MODERATE · GitHub CVSS 5.0
  6. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  7. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  8. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  10. 2026-11-06 16:36 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  12. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  13. 2026-11-04 01:45 UTCEchelonGraph re-scored
  14. 2026-11-04 01:45 UTCGHSA enrichmentGHSA-8qg9-895h-w83f · GitHub severity MODERATE · GitHub CVSS 5.0
  15. 2026-11-03 16:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  16. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  17. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  18. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  19. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  20. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  22. 2026-10-28 15:46 UTCEchelonGraph re-scored
  23. 2026-10-28 15:46 UTCGHSA enrichmentGHSA-8qg9-895h-w83f · GitHub CVSS 5.0
  24. 2026-10-26 17:35 UTCEchelonGraph re-scored
  25. 2026-10-26 17:35 UTCGHSA enrichmentGHSA-8qg9-895h-w83f · GitHub CVSS 5.0
Show 8 more
  1. 2026-10-26 17:00 UTCEchelonGraph re-scored
  2. 2026-10-26 16:59 UTCGHSA enrichmentGHSA-8qg9-895h-w83f · GitHub CVSS 5.0
  3. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  4. 2026-10-26 14:44 UTCEchelonGraph re-scored
  5. 2026-10-26 14:43 UTCGHSA enrichmentGHSA-8qg9-895h-w83f · GitHub CVSS 5.0
  6. 2026-10-25 14:26 UTCEchelonGraph re-scored
  7. 2026-10-25 13:27 UTCEchelonGraph re-scoredFirst assessed: 5.0 MEDIUM
  8. 2026-10-25 13:27 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-116187?
CVE-2026-116187 is a medium-severity vulnerability; its CVE record was published on October 25, 2026. Rclone from v1.68.0 before v1.75.2 contains an authorization bypass vulnerability in serve s3 --auth-proxy that allows authenticated tenants to manipulate other tenants' multipart uploads by referencing their upload IDs. Attackers who learn a victim's bucket, object, and upload ID can inject parts,…
When was CVE-2026-116187 made public?
CVE-2026-116187 was made public on October 9, 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 October 25, 2026. EchelonGraph's copy of the record carries a last-modified date of October 28, 2026; the record at its source may have been updated since.
Is CVE-2026-116187 actively exploited?
CVE-2026-116187 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-116187?
CVE-2026-116187 has a CVSS base score of 5.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-116187?
A fix for CVE-2026-116187 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-116187 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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