CVE-2019-12526

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

An issue was discovered in Squid before 4.9. URN response handling in Squid suffers from a heap-based buffer overflow. When receiving data from a remote server in response to an URN request, Squid fails to ensure that the response can fit within the buffer. This leads to attacker controlled data overflowing in the heap.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

No affected versions have been published.

Timeline

Published
Nov 26, 2019
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2019

CVE-2019-125278.8An issue was discovered in Squid 4.0.23 through 4.7. When checking Basic Authentication with HttpHeader::getAuth, Squid uses a global bufferCVE-2019-125287.5An issue was discovered in Squid before 4.10. It allows a crafted FTP server to trigger disclosure of sensitive information from heap memoryCVE-2019-125295.9An issue was discovered in Squid 2.x through 2.7.STABLE9, 3.x through 3.5.28, and 4.x through 4.7. When Squid is configured to use Basic AutCVE-2019-12537.8An elevation of privilege vulnerability exists when the Windows AppX Deployment Server improperly handles junctions.To exploit this vulnerabCVE-2019-125309.8Incorrect access control was discovered in the stdonato Dashboard plugin through 0.9.7 for GLPI, affecting df.php, issue.php, load.php, mem.CVE-2019-125327.8Improper access control in the Insyde software tools may allow an authenticated user to potentially enable escalation of privilege, or inforCVE-2019-125376.1An issue was discovered in Zoho ManageEngine AssetExplorer. There is XSS via the SearchN.do search field.CVE-2019-125386.1An issue was discovered in Zoho ManageEngine ServiceDesk Plus 9.3. There is XSS via the SiteLookup.do search field.CVE-2019-125396.1An issue was discovered in the Purchase component of Zoho ManageEngine ServiceDesk Plus. There is XSS via the SearchN.do search field, a difCVE-2019-12545.5An information disclosure vulnerability exists when Windows Hyper-V writes uninitialized memory to disk, aka 'Windows Hyper-V Information DiCVE-2019-125406.1An issue was discovered in Zoho ManageEngine ServiceDesk Plus 10.5. There is XSS via the WorkOrder.do search field.CVE-2019-125416.1An issue was discovered in Zoho ManageEngine ServiceDesk Plus 9.3. There is XSS via the SolutionSearch.do searchText parameter.
CVE-2019-12526: Critical severity, CVSS 9.8 | Vulnix