CVE-2026-91986

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-09-15. a secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

gitoxide gix-transport before 0.59.2 fails to filter control characters in git-daemon connect requests, allowing attackers to inject NUL/CR/LF bytes via crafted git URLs. Attackers can inject extra NUL-delimited protocol fields to spoof virtual hosts or inject newlines into daemon requests and logs.

CVSS v3
5.4
EG Score
5.4(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

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
Severity54% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 23, 2026

Advisory Details (2)

Auto-updated Sep 15, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

gitoxide gix-transport before 0.59.2 CR/LF/NUL Injection | Advisories | VulnCheck

https://www.vulncheck.com/advisories/gitoxide-gix-transport-before-0.59.2-cr-lf-nul-injection
github Patch Available🟡 PoC Available

gix-transport: CR/LF/NUL injection into git-daemon connect request via crafted git:// URL path · Advisory · GitoxideLabs/gitoxide · GitHub

https://github.com/GitoxideLabs/gitoxide/security/advisories/GHSA-rc7h-wp5f-w3g5

Vendor Advisories for CVE-2026-91986(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.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 28× in last 7d / 37× 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. 2026-09-24 19:29 UTCEG score recompute
  2. 2026-09-24 19:29 UTCVendor advisory
  3. 2026-09-24 19:29 UTCGHSA enrichment
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-23 17:54 UTCEPSS rescore
  6. 2026-09-23 17:21 UTCVendor advisory
  7. 2026-09-23 17:21 UTCGHSA enrichment
  8. 2026-09-22 22:35 UTCEG score recompute
  9. 2026-09-22 22:35 UTCVendor advisory
  10. 2026-09-22 22:35 UTCGHSA enrichment
  11. 2026-09-22 16:01 UTCEPSS rescore
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-21 20:26 UTCEG score recompute
  14. 2026-09-21 20:26 UTCVendor advisory
  15. 2026-09-21 20:26 UTCGHSA enrichment
  16. 2026-09-21 19:31 UTCEG score recompute
  17. 2026-09-21 19:31 UTCVendor advisory
  18. 2026-09-21 19:31 UTCGHSA enrichment
  19. 2026-09-21 03:15 UTCEG score recompute
  20. 2026-09-21 03:15 UTCVendor advisory
  21. 2026-09-21 03:15 UTCGHSA enrichment
  22. 2026-09-20 20:16 UTCEPSS rescore
  23. 2026-09-20 01:06 UTCEG score recompute
  24. 2026-09-20 01:06 UTCVendor advisory
  25. 2026-09-20 01:06 UTCGHSA enrichment
Show 12 more
  1. 2026-09-18 22:57 UTCEG score recompute
  2. 2026-09-18 22:57 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-17 20:50 UTCEG score recompute
  5. 2026-09-17 20:50 UTCGHSA enrichment
  6. 2026-09-17 19:32 UTCEPSS rescore
  7. 2026-09-16 18:41 UTCEG score recompute
  8. 2026-09-16 18:41 UTCGHSA enrichment
  9. 2026-09-16 14:09 UTCEPSS rescore
  10. 2026-09-15 16:32 UTCEG score recompute
  11. 2026-09-15 15:23 UTCEG score recompute
  12. 2026-09-15 15:22 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-91986?
CVE-2026-91986 is a medium vulnerability published on September 15, 2026. gitoxide gix-transport before 0.59.2 fails to filter control characters in git-daemon connect requests, allowing attackers to inject NUL/CR/LF bytes via crafted git URLs. Attackers can inject extra NUL-delimited protocol fields to spoof virtual hosts or inject newlines into daemon requests and logs.
When was CVE-2026-91986 disclosed?
CVE-2026-91986 was first published in the National Vulnerability Database on September 15, 2026, with the most recent update on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-91986 actively exploited?
CVE-2026-91986 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 83.9% of all scored CVEs.
What is the CVSS score of CVE-2026-91986?
CVE-2026-91986 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-91986?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-91986, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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