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When asking to get a file from a file:// URL, libcurl provides a feature that outputs…

Priority LOW 34CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-200.

Summary

When asking to get a file from a file:// URL, libcurl provides a feature that outputs meta-data about the file using HTTP-like headers. The code doing this would send the wrong buffer to the user (stdout or the application's provide callback), which could lead to other private data from the heap to get inadvertently displayed. The wrong buffer was an uninitialized memory area allocated on the heap and if it turned out to not contain any zero byte, it would continue and display the data following that buffer in memory.

Why it matters now

EPSS 0.02653 85th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:haxx:libcurl:7.54.1:*:*:*:*:*:*:*7.54.1VulnerableHaxx
  • cpe:2.3:a:haxx:libcurl:7.54.1:*:*:*:*:*:*:* Versions 7.54.1 Vulnerable ·Haxx

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 10 products
  • .NET Core 1.0 on Red Hat Enterprise Linux
  • .NET Core 1.1 on Red Hat Enterprise Linux
  • .NET Core 2.0 on Red Hat Enterprise Linux
  • Red Hat Ceph Storage 2
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Virtualization 3
  • Red Hat JBoss Enterprise Web Server 3
  • Red Hat Software Collections

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-1000099
  2. 2026-10-03 Alias added: GHSA-q937-ph5c-26qf

References

  • TI-2023-19922 Out-of-bounds write in curl CVSS 3.1CRITICAL 9.8
  • TI-2020-06702 Uncontrolled recursion in https://github.com/curl/curl CVSS 3.1HIGH 7.5
  • TI-2025-00616 gzip integer overflow CVSS 3.1HIGH 7.3
  • TI-2019-03845 Heap-based buffer overflow in curl CVSS 3.1HIGH 7.8
  • TI-2021-05737 Information disclosure in https://github.com/curl/curl CVSS 3.1MEDIUM 5.3
  • TI-2017-06326 Out-of-bounds read in curl and libcurl before 7.57.0 CVSS 3.1CRITICAL 9.8
See all 60 →

Sources