CVE-2026-12549

MEDIUM

CVSS v3.1: 4.8 · EPSS: 0.0032 (23.2 percentile)

NetworkNo privilegesNo user interaction

Source data as of:

At a glance

Severity
MEDIUM
CVSS
4.8 v3.1 · NVD
EPSS
0.0032 (23.2 percentile) · FIRST.org
CISA KEV
No
Attack conditions (CVSS vector)
NetworkNo privilegesNo user interaction · Source: NVD Vector
Published
2026-06-22 · Modified: 2026-06-23
References
Jump to references (4)

CVSS / EPSS / KEV

CVSS v3.1 4.8 / 10 MEDIUM Source: NVD
EPSS 0.0032 23.2 percentile Source: FIRST.org
CISA KEV No Source: CISA

Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources

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.

Record details

CVE ID
CVE-2026-12549
CVSS (v3.1)
4.8 (MEDIUM)
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Exploitability subscore
2.2
Impact subscore
2.5
EPSS
0.0032 (23.2 percentile) — 2026-06-24
CISA KEV
No
Weakness (CWE)
CWE-805
Affected configurations (CPE)
0
Published
2026-06-22
Modified
2026-06-23
Status
Awaiting Analysis

References

Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.

Related records

Other records sharing a factual facet, for cross-reference. A descriptive neighbourhood — ordering does not imply priority and is not a recommendation.

Published the same year

CVE-2026-10561 CRITICAL CVSS 10.0 CVE-2026-27604 CRITICAL CVSS 10.0 CVE-2026-34908 CRITICAL CVSS 10.0 KEV CVE-2026-34909 CRITICAL CVSS 10.0 KEV
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