Vulnerability-Lookup

CVE-2026-12549 (GCVE-0-2026-12549)

Vulnerability from cvelistv5 – Published: 2026-06-22 13:55 – Updated: 2026-06-23 14:18

Title

Libsoup: incomplete fix for cve-2026-2443: range suffix overflow in libsoup soupserver

Summary

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.

Severity

4.8 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-805 - Buffer Access with Incorrect Length Value

Assigner

redhat

References

4 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-12549	vdb-entryx_refsource_REDHAT
https://access.redhat.com/security/cve/cve-2026-0716	technical-descriptionx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2489999	issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/516

Impacted products

5 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9

Date Public

2024-04-24 00:00

Show details on NVD website

JSON

To clipboard

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GHSA-7GWX-VGP2-4HMG

Vulnerability from github – Published: 2026-06-22 18:34 – Updated: 2026-06-22 18:34

Details

Severity

4.8 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-12549"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-805"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-22T16:16:34Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-7gwx-vgp2-4hmg",
  "modified": "2026-06-22T18:34:14Z",
  "published": "2026-06-22T18:34:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12549"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-12549"
    },
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      "url": "https://access.redhat.com/security/cve/cve-2026-0716"
    },
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    },
    {
      "type": "WEB",
      "url": "https://gitlab.gnome.org/GNOME/libsoup/-/work_items/516"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-12549 (GCVE-0-2026-12549)

GHSA-7GWX-VGP2-4HMG

Tags

Sightings

Nomenclature