An incorrect authorization vulnerability was identified in GitHub Enterprise Server that allowed a user-to-server token scoped to a GitHub App installation to perform certain write operations on public repositories outside the token's intended scope. This was possible because the authorization check only verified that the installation had read permissions on the target repository rather than verifying that the token's installation was explicitly granted access to that repository. An attacker who obtained a victim's user-to-server token could create issues, issue comments, commit comments, and private vulnerability reports on any public repository, appearing as the victim user with no indication of the app involvement. This vulnerability was fixed by adding a repository scope check for user-to-server tokens issued by global apps. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.21.2, 3.20.4, 3.19.8, 3.18.11, 3.17.17, 3.16.20. This vulnerability was reported via the GitHub Bug Bounty program.
CVE-2026-14340
“—” beside the score: it is equal to NVD's CVSS score.
Score 5.0 from GitHub Security Advisory published 2026-07-01. NVD baseline CVSS 5.0; sources differ by 0.0.
Also known asEUVD-2026-41145 (ENISA EUVD) · GHSA-86rx-87q3-fqhc (GitHub Security Advisories)Source: ENISA EUVD
- Lower severity and no public exploit yet
The CVE record names the fixed release — apply it.
- CVSS v3
- 5.0
- EG Score
- 5.0MEDIUMmedium confidence
- EG Risk
- 23EG 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.Exploitation0.4% × 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: The CVE record names the fixed release. Apply it within your standard update timelines. - EPSS PROB
- 0.4%
- EPSS %ILE
- 36th
- 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
- 0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). 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: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.
The CVE record names the fixed release. 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.
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
July 1, 2026
Last Modified
October 25, 2026
Advisory Details (6)
Auto-updated Jul 3, 2026Release notes - GitHub Enterprise Server 3.21 Docs
https://docs.github.com/en/[email protected]/admin/release-notes#3.21.2Release notes - GitHub Enterprise Server 3.20 Docs
https://docs.github.com/en/[email protected]/admin/release-notes#3.20.4Release notes - GitHub Enterprise Server 3.19 Docs
https://docs.github.com/en/[email protected]/admin/release-notes#3.19.8Release notes - GitHub Enterprise Server 3.18 Docs
https://docs.github.com/en/[email protected]/admin/release-notes#3.18.11Release notes - GitHub Enterprise Server 3.17 Docs
https://docs.github.com/en/[email protected]/admin/release-notes#3.17.17Release notes - GitHub Enterprise Server 3.16 Docs
https://docs.github.com/en/[email protected]/admin/release-notes#3.16.20Vendor Advisories for CVE-2026-14340(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 11× in last 7d / 37× 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 207 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 107 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-10-25 16:26 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-10-25 14:48 UTCEG score recompute
- 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-23 06:32 UTCEG score recompute
- 2026-10-23 06:32 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-18 05:02 UTCEG score recompute
- 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-12 16:33 UTCEG score recompute
- 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-11 20:10 UTCEG score recompute
- 2026-10-11 18:23 UTCEG score recompute
- 2026-10-11 14:56 UTCEG score recompute
Show 75 moreShow fewer
- 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-23 06:48 UTCEG score recompute
- 2026-09-23 06:48 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-18 06:28 UTCEG score recompute
- 2026-09-18 06:28 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-13 12:56 UTCEG score recompute
- 2026-09-13 12:56 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-12 14:36 UTCEG score recompute
- 2026-09-12 14:36 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-06 00:37 UTCEG score recompute
- 2026-09-06 00:37 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-30 11:35 UTCEG score recompute
- 2026-08-30 11:34 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-27 22:24 UTCEG score recompute
- 2026-08-27 22:24 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-25 02:31 UTCEG score recompute
- 2026-08-25 02:30 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-08-24 04:10 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-08-23 05:25 UTCEG score recompute
- 2026-08-23 05:25 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-08-22 06:55 UTCEG score recompute
- 2026-08-22 06:55 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-08-21 04:30 UTCEG score recompute
- 2026-08-21 04:30 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-08-20 04:35 UTCEG score recompute
- 2026-08-20 04:35 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-08-18 22:31 UTCEG score recompute
- 2026-08-18 22:30 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-08-17 23:32 UTCEG score recompute
- 2026-08-17 23:32 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-08-17 01:09 UTCEG score recompute
- 2026-08-17 01:09 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-08-16 02:49 UTCEG score recompute
- 2026-08-16 02:49 UTCGHSA enrichmentGHSA-86rx-87q3-fqhc · GitHub CVSS 5.0
- 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-08-15 04:29 UTCEG score recompute
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Frequently asked(5)
What is CVE-2026-14340?
When was the CVE record for CVE-2026-14340 published?
Is CVE-2026-14340 actively exploited?
What is the CVSS score of CVE-2026-14340?
How do I remediate CVE-2026-14340?
Dependency Blast Radius
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