HOMEVULNERABILITIESCVE-2026-41257
MEDIUM

CVE-2026-41257

CWE-190Published: May 11, 2026· Updated: May 13, 2026

5.5
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:2.9th

Official Description

jq is a command-line JSON processor. In 1.8.1 and earlier, the jq bytecode VM's data stack tracks its allocation size in a signed int. When the stack grows beyond ≈1 GiB (via deeply nested generator forks), the doubling arithmetic overflows. The wrapped value is passed to realloc and then used for a memmove with attacker-influenced offsets.

NVD Source

Technical Analysis

CVE-2026-41257 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected Vendors & Products

jqlang1 product
jq
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/jqlang/jq/security/advisories/GHSA-4jm8-m363-4539
ADVISORYhttps://github.com/jqlang/jq/security/advisories/GHSA-4jm8-m363-4539

All References (2)

→
https://github.com/jqlang/jq/security/advisories/GHSA-4jm8-m363-4539Exploit · Mitigation · Vendor Advisory
→
https://github.com/jqlang/jq/security/advisories/GHSA-4jm8-m363-4539Exploit · Mitigation · Vendor Advisory

Quick Facts

CVE IDCVE-2026-41257
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-190
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedMay 11, 2026

Related CVEs (CWE-190)

CVE-2026-24214
9.8
CVE-2026-42217
9.8
CVE-2026-30909
9.8
CVE-2026-24450
9.8
CVE-2026-40962
9.8
CVE-2026-14544
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-41257 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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