CVE-2026-12549

June 22, 2026, 6:33 p.m.

4.8
Medium

Description

The fix for CVE-2026-2443 was regressed by a subsequent rework commit that replaced specific overflow checks with a general signed comparison. When a client sends a Range request with a suffix length exceeding the content size, the resulting negative start value is not properly clamped, leading to malformed HTTP 206 responses and log flooding.

Product(s) Impacted

Vendor Product Versions
Redhat
  • Http Server
  • *

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-805
Buffer Access with Incorrect Length Value
The product uses a sequential operation to read or write a buffer, but it uses an incorrect length value that causes it to access memory that is outside of the bounds of the buffer.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a redhat http_server / / / / / / / /

References

https://access.redhat.com/security/cve/CVE-2026-12549
https://access.redhat.com/security/cve/cve-2026-0716
https://bugzilla.redhat.com/show_bug.cgi?id=2489999
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/516

Tags

[email protected]
CWE-805
2026-06-22
CVE-2026-12549

CVSS Score

4.8 / 10

CVSS Data - 3.1

  • Attack Vector: NETWORK
  • Attack Complexity: HIGH
  • Privileges Required: NONE
  • Scope: UNCHANGED
  • Confidentiality Impact: LOW
  • Integrity Impact: NONE
  • Availability Impact: LOW

    • CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

    View Vector String

Timeline

Published: June 22, 2026, 4:16 p.m.
Last Modified: June 22, 2026, 6:33 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.