CVE-2025-9086

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2025-09-12. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

  • A cookie is set using the secure keyword for https://target
  • curl is redirected to or otherwise made to speak with http://target (same
hostname, but using clear text HTTP) using the same cookie set
  • The same cookie name is set - but with just a slash as path (path=\"/\",).
Since this site is not secure, the cookie *should* just be ignored.
  • A bug in the path comparison logic makes curl read outside a heap buffer
boundary

The bug either causes a crash or it potentially makes the comparison come to the wrong conclusion and lets the clear-text site override the contents of the secure cookie, contrary to expectations and depending on the memory contents immediately following the single-byte allocation that holds the path.

The presumed and correct behavior would be to plainly ignore the second set of the cookie since it was already set as secure on a secure host so overriding it on an insecure host should not be okay.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
70%
KEV
Not listed

Published

September 12, 2025

Last Modified

June 17, 2026

References (7)

Vendor Advisories for CVE-2025-9086(7)

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

Patch Availability(14)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibcurl4t64 (8.14.1-2ubuntu1.1) @ questing2026-05-29ubuntu
redhatcurl-main-8.19.0-3.hum12026-04-07redhat
redhatrhui5/rhua-rhel9:17736701372026-03-18redhat
redhatrhui5/installer-rhel9:17706469252026-02-11redhat
redhatinsights-proxy/insights-proxy-container-rhel9:17707404052026-02-10redhat
redhatcurl-0:8.12.1-2.el10_1.22026-02-03redhat
redhatdiscovery/discovery-server-rhel9:17691047652026-02-02redhat
redhatcurl-0:8.12.1-1.el10_0.42026-01-28redhat
redhatcurl-0:7.76.1-35.el9_7.32026-01-27redhat
redhatcurl-0:7.61.1-34.el8_10.92025-12-18redhat
redhatcurl-0:7.76.1-23.el9_2.82025-12-11redhat
redhatcurl-0:7.76.1-29.el9_4.32025-12-11redhat
redhatcurl-0:7.76.1-14.el9_0.122025-12-11redhat
redhatcurl-0:7.76.1-31.el9_6.22025-12-10redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(9 across 9 ecosystems)
Alpine:v3.19(1)
PackageVulnerable rangeFixed inDependents
curl—8.14.1-r2—
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
curl—8.14.1-r2—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
curl—8.14.1-r2—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
curl—8.14.1-r2—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
curl—8.16.0-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
curl—8.16.0-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
curl7.74.0-1.3 ... 7.74.0-1.3+deb11u9 (17 versions)7.74.0-1.3+deb11u16—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
curl8.14.1-28.14.1-2+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
curl8.14.1-2 ... 8.16.0~rc1-1~exp1 (9 versions)8.16.0~rc2-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(9)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 27× 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.

Showing the most recent 100 of 128 total refreshes for this CVE.

  1. 2026-08-30 19:17 UTCEPSS rescore
  2. 2026-08-30 01:21 UTCEPSS rescore
  3. 2026-08-28 21:40 UTCEPSS rescore
  4. 2026-08-27 14:24 UTCEPSS rescore
  5. 2026-08-25 13:48 UTCEPSS rescore
  6. 2026-08-25 04:26 UTCOSV refresh
  7. 2026-08-23 00:19 UTCEPSS rescore
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  20. 2026-08-08 21:49 UTCOSV refresh
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  1. 2026-08-03 10:35 UTCEPSS rescore
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  12. 2026-07-23 20:41 UTCOSV refresh
  13. 2026-07-23 14:18 UTCEPSS rescore
  14. 2026-07-23 03:03 UTCEG score recompute
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  27. 2026-07-15 01:59 UTCEPSS rescore
  28. 2026-07-13 06:12 UTCEPSS rescore
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  31. 2026-07-11 08:27 UTCEPSS rescore
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  36. 2026-07-06 16:27 UTCEPSS rescore
  37. 2026-07-06 15:01 UTCOSV refresh
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  50. 2026-06-28 04:56 UTCEPSS rescore
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  68. 2026-06-18 03:05 UTCOSV refresh
  69. 2026-06-17 17:53 UTCEPSS rescore
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  75. 2026-06-12 23:12 UTCEPSS rescore

Frequently asked(5)

What is CVE-2025-9086?
CVE-2025-9086 is a high vulnerability published on September 12, 2025. 1. A cookie is set using the secure keyword for https://target 2. curl is redirected to or otherwise made to speak with http://target (same hostname, but using clear text HTTP) using the same cookie set 3. The same cookie name is set - but with just a slash as path (path=\"/\",). Since this site is…
When was CVE-2025-9086 disclosed?
CVE-2025-9086 was first published in the National Vulnerability Database on September 12, 2025, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-9086 actively exploited?
CVE-2025-9086 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 29.5% of all scored CVEs.
What is the CVSS score of CVE-2025-9086?
CVE-2025-9086 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2025-9086?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-9086, 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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