CVE-2026-91839

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-25. A secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in NetworkManager-fortisslvpn, the FortiSSLVPN plugin for NetworkManager. The nm-fortisslvpn-service improperly handles carriage-return/line-feed (CR/LF) characters in VPN connection profile credentials. A local unprivileged user can exploit this by crafting a malicious VPN profile to inject additional configuration directives. This can lead to arbitrary code execution with root privileges when the crafted VPN connection is activated.

CVSS v3
7.8
EG Score
7.8HIGHhigh confidence
EG Risk
35
EG Risk 35/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
9th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 25, 2026

Last Modified

September 30, 2026

Advisory Details (3)

Auto-updated Sep 25, 2026
Patch available. Sources: redhat.
generic

NetworkManager-fortisslvpn credential newline injection permits local root code execution (#80) · Tickets · Archive / NetworkManager-fortisslvpn · GitLab

https://gitlab.gnome.org/Archive/NetworkManager-fortisslvpn/-/work_items/80
redhat

2533640 – (CVE-2026-91839) CVE-2026-91839 NetworkManager-fortisslvpn: NetworkManager-fortisslvpn: local privilege escalation to root via CRLF injection in VPN profile credentials

https://bugzilla.redhat.com/show_bug.cgi?id=2533640
redhat Patch Available

CVE-2026-91839 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-91839

Vendor Advisories for CVE-2026-91839(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 30× in last 7d / 43× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-10-04 13:07 UTCGHSA enrichment
  2. 2026-10-04 00:23 UTCEG score recompute
  3. 2026-10-04 00:23 UTCGHSA enrichment
  4. 2026-10-03 11:41 UTCGHSA enrichment
  5. 2026-10-02 22:51 UTCEG score recompute
  6. 2026-10-02 22:51 UTCGHSA enrichment
  7. 2026-10-02 10:09 UTCGHSA enrichment
  8. 2026-10-01 21:27 UTCEG score recompute
  9. 2026-10-01 21:27 UTCGHSA enrichment
  10. 2026-10-01 19:51 UTCEPSS rescore
  11. 2026-10-01 08:44 UTCGHSA enrichment
  12. 2026-09-30 20:02 UTCGHSA enrichment
  13. 2026-09-30 16:35 UTCEG score recompute
  14. 2026-09-30 16:35 UTCGHSA enrichment
  15. 2026-09-30 15:04 UTCEPSS rescore
  16. 2026-09-30 03:41 UTCEG score recompute
  17. 2026-09-30 03:40 UTCGHSA enrichment
  18. 2026-09-29 14:54 UTCGHSA enrichment
  19. 2026-09-29 02:12 UTCEG score recompute
  20. 2026-09-29 02:12 UTCGHSA enrichment
  21. 2026-09-28 13:52 UTCEPSS rescore
  22. 2026-09-28 13:52 UTCEPSS rescore
  23. 2026-09-28 13:29 UTCEG score recompute
  24. 2026-09-28 13:29 UTCGHSA enrichment
  25. 2026-09-28 12:52 UTCEG score recompute
Show 18 more
  1. 2026-09-28 12:52 UTCGHSA enrichment
  2. 2026-09-28 07:12 UTCGHSA enrichment
  3. 2026-09-27 18:30 UTCEG score recompute
  4. 2026-09-27 18:30 UTCGHSA enrichment
  5. 2026-09-27 13:49 UTCEPSS rescore
  6. 2026-09-27 05:47 UTCGHSA enrichment
  7. 2026-09-26 17:05 UTCEG score recompute
  8. 2026-09-26 17:05 UTCGHSA enrichment
  9. 2026-09-26 15:59 UTCEPSS rescore
  10. 2026-09-26 04:22 UTCEG score recompute
  11. 2026-09-26 04:22 UTCGHSA enrichment
  12. 2026-09-26 04:05 UTCEG score recompute
  13. 2026-09-26 04:05 UTCGHSA enrichment
  14. 2026-09-25 19:34 UTCGHSA enrichment
  15. 2026-09-25 18:37 UTCEG score recompute
  16. 2026-09-25 18:36 UTCGHSA enrichment
  17. 2026-09-25 18:00 UTCEG score recompute
  18. 2026-09-25 17:59 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-91839?
CVE-2026-91839 is a high vulnerability published on September 25, 2026. A flaw was found in NetworkManager-fortisslvpn, the FortiSSLVPN plugin for NetworkManager. The nm-fortisslvpn-service improperly handles carriage-return/line-feed (CR/LF) characters in VPN connection profile credentials. A local unprivileged user can exploit this by crafting a malicious VPN profile…
When was CVE-2026-91839 disclosed?
CVE-2026-91839 was first published on September 25, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-91839 actively exploited?
CVE-2026-91839 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (9th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-91839?
CVE-2026-91839 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-91839?
A fix for CVE-2026-91839 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-91839 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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