How severe is CVE-2026-40612?

CVE-2026-40612 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-40612 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40612?

CVE-2026-40612 affects Jqlang Jq. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40612?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-40612 have an EU (EUVD) identifier?

Yes. CVE-2026-40612 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29161.

When was CVE-2026-40612 published?

CVE-2026-40612 was published on 2026-05-11 and last updated on 2026-06-17.

CVE-2026-40612

CVE-2026-40612 is a medium-severity vulnerability in Jqlang Jq with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-674.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v4: 5.4
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29161
Weakness: CWE-674
Affected product: Jqlang Jq
Published: 2026-05-11
Last modified: 2026-06-17

Description

jq is a command-line JSON processor. In 1.8.1 and earlier, jv_contains recurses into nested arrays/objects with no depth limit. With a sufficiently nested input structure (built programmatically with reduce, since the JSON parser caps at depth 10000), the C stack is exhausted.

Frequently asked questions

What is CVE-2026-40612?: jq is a command-line JSON processor. In 1.8.1 and earlier, jv_contains recurses into nested arrays/objects with no depth limit. With a sufficiently nested input structure (built programmatically with reduce, since the JSON parser caps at depth 10000), the C stack is exhausted.
How severe is CVE-2026-40612?: CVE-2026-40612 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-40612 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40612?: CVE-2026-40612 affects Jqlang Jq. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40612?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-40612 have an EU (EUVD) identifier?: Yes. CVE-2026-40612 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29161.
When was CVE-2026-40612 published?: CVE-2026-40612 was published on 2026-05-11 and last updated on 2026-06-17.

References

https://github.com/jqlang/jq/security/advisories/GHSA-r7m6-x9c7-h69j

Affected products (1)

cpe:2.3:a:jqlang:jq:*:*:*:*:*:*:*:*

More vulnerabilities in Jqlang Jq

CVE-2026-32316 — High (CVSS 8.2): jq is a command-line JSON processor. An integer overflow vulnerability exists through version 1.8.1 within the…
CVE-2024-53427 — High (CVSS 8.1): decNumberCopy in decNumber.c in jq through 1.7.1 does not properly consider that NaN is interpreted as numeric, which…
CVE-2025-48060 — High (CVSS 7.5): jq is a command-line JSON processor. In versions up to and including 1.7.1, a heap-buffer-overflow is present in…
CVE-2023-49355 — High (CVSS 7.5): decToString in decNumber/decNumber.c in jq 88f01a7 has a one-byte out-of-bounds write via the " []-1.2e-1111111111"…
CVE-2026-49839 — High (CVSS 7.1): jq is a command-line JSON processor. Prior to 1.8.2,` jq --rawfile` can turn a handled oversized-string error into…
CVE-2026-39979 — Medium (CVSS 6.5): jq is a command-line JSON processor. In commits before 2f09060afab23fe9390cce7cb860b10416e1bf5f, the jv_parse_sized()…

All CVEs affecting Jqlang Jq →

Other CWE-674 (Uncontrolled Recursion) vulnerabilities

CVE-2026-43185 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix signededness bug in…
CVE-2023-51803 — Critical (CVSS 9.8): LinuxServer.io Heimdall before 2.5.7 does not prevent use of icons that have non-image data such as the "<?php ?>"…
CVE-2021-41752 — Critical (CVSS 9.8): Stack overflow vulnerability in Jerryscript before commit e1ce7dd7271288be8c0c8136eea9107df73a8ce2 on Oct 20, 2021 due…
CVE-2018-1000618 — Critical (CVSS 9.8): EOSIO/eos eos version after commit f1545dd0ae2b77580c2236fdb70ae7138d2c7168 contains a stack overflow vulnerability in…
CVE-2025-10728 — Critical (CVSS 9.4): When the module renders a Svg file that contains a <pattern> element, it might end up rendering it recursively leading…
CVE-2026-40324 — Critical (CVSS 9.1): Hot Chocolate is an open-source GraphQL server. Prior to versions 12.22.7, 13.9.16, 14.3.1, and 15.1.14, Hot…

Browse all CWE-674 (Uncontrolled Recursion) vulnerabilities →