CVE-2026-54679: CWE-190: Integer Overflow or Wraparound in jqlang jq
jq is a command-line JSON processor. Prior to 1.8.2, on 32bit system, jvp_string_append has a chance of integer/multiple overflowing and then causing a massive buffer overrun. This vulnerability is fixed in 1.8.2.
AI Analysis
Technical Summary
CVE-2026-54679 describes an integer overflow or wraparound vulnerability (CWE-190) in the jq command-line JSON processor. Specifically, on 32-bit systems, the jvp_string_append function may experience integer or multiple overflows, resulting in a large buffer overrun condition. This vulnerability affects jq versions before 1.8.2 and has been resolved in version 1.8.2.
Potential Impact
Exploitation of this vulnerability could lead to a buffer overrun, which may cause application crashes or potentially allow an attacker to execute arbitrary code or cause denial of service. The CVSS 4.0 base score is 6.9 (medium severity), indicating a significant impact but requiring local access with low complexity and no privileges or user interaction.
Mitigation Recommendations
Upgrade jq to version 1.8.2 or later, where this integer overflow and buffer overrun vulnerability has been fixed. No other mitigation or temporary workaround is indicated.
CVE-2026-54679: CWE-190: Integer Overflow or Wraparound in jqlang jq
Description
jq is a command-line JSON processor. Prior to 1.8.2, on 32bit system, jvp_string_append has a chance of integer/multiple overflowing and then causing a massive buffer overrun. This vulnerability is fixed in 1.8.2.
CVSS v4.0
Score 6.9medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-54679 describes an integer overflow or wraparound vulnerability (CWE-190) in the jq command-line JSON processor. Specifically, on 32-bit systems, the jvp_string_append function may experience integer or multiple overflows, resulting in a large buffer overrun condition. This vulnerability affects jq versions before 1.8.2 and has been resolved in version 1.8.2.
Potential Impact
Exploitation of this vulnerability could lead to a buffer overrun, which may cause application crashes or potentially allow an attacker to execute arbitrary code or cause denial of service. The CVSS 4.0 base score is 6.9 (medium severity), indicating a significant impact but requiring local access with low complexity and no privileges or user interaction.
Mitigation Recommendations
Upgrade jq to version 1.8.2 or later, where this integer overflow and buffer overrun vulnerability has been fixed. No other mitigation or temporary workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-15T22:53:58.561Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3d65db4853345fc13feb09
Added to database: 06/25/2026, 17:31:07 UTC
Last enriched: 07/02/2026, 23:37:28 UTC
Last updated: 08/08/2026, 12:41:11 UTC
Views: 68
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