CVE-2026-47770

medium

Published 2026-06-25 · Modified 2026-06-26

💬 Discuss on Community ✚ Propose mitigation

CVSS v3

5.5

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

CVSS v4 NEW

6.8

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

VIR risk

5.5

Description

jq is a command-line JSON processor. Prior to 1.8.2, comparing two sufficiently deeply nested arrays with the == operator exhausts the C stack on jq's ordinary command-line surface, resulting in denial of service via stack exhaustion (uncontrolled recursion). The crash occurs in jq's recursive structural comparison code, with the recursion repeating through jvp_array_equal() and jv_equal() in src/jv.c when comparing deeply nested arrays; a nearby sort comparator path through jv_cmp() in src/jv_aux.c overflows the stack at a larger nesting depth from the same missing recursion guard. Anyone running jq comparisons on attacker-controlled deeply nested JSON values, or embedding jq in a context where untrusted data can reach the == comparison path, is affected. This vulnerability is fixed in 1.8.2.

Predictions

Exploit likelihood

55%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Debian Security Tracker · View original ↗ · DFSG

CVE-2026-47770 NameCVE-2026-47770 Descriptionjq is a command-line JSON processor. Prior to 1.8.2, comparing two sufficiently deeply nested arrays with the == operator exhausts the C stack on jq's ordinary command-line surface, resulting in denial of service via stack exhaustion (uncontrolled recursion). The crash occurs in jq's recursive structural comparison code, with the recursion repeating…

CVE-2026-47770

Name	CVE-2026-47770
Description	jq is a command-line JSON processor. Prior to 1.8.2, comparing two sufficiently deeply nested arrays with the == operator exhausts the C stack on jq's ordinary command-line surface, resulting in denial of service via stack exhaustion (uncontrolled recursion). The crash occurs in jq's recursive structural comparison code, with the recursion repeating through jvp_array_equal() and jv_equal() in src/jv.c when comparing deeply nested arrays; a nearby sort comparator path through jv_cmp() in src/jv_aux.c overflows the stack at a larger nesting depth from the same missing recursion guard. Anyone running jq comparisons on attacker-controlled deeply nested JSON values, or embedding jq in a context where untrusted data can reach the == comparison path, is affected. This vulnerability is fixed in 1.8.2.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4661-1, DLA-4662-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
jq (PTS)	bullseye	1.6-2.1	vulnerable
	bullseye (security)	1.6-2.1+deb11u3	fixed
	bookworm	1.6-2.1+deb12u1	vulnerable
	bookworm (security)	1.6-2.1+deb12u2	fixed
	trixie	1.7.1-6+deb13u2	vulnerable
	forky	1.8.1-8	fixed
	sid	1.8.2-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
jq	source	bullseye	1.6-2.1+deb11u3	DLA-4661-1
jq	source	bookworm	1.6-2.1+deb12u2	DLA-4662-1
jq	source	(unstable)	1.8.1-7

Notes

https://github.com/jqlang/jq/commit/7122866869960b55cea3646bc91334ef55787831
https://github.com/jqlang/jq/pull/3539

Home - Debian Security - Source (Git)

Apply commands

text fix

Notes

https://github.com/jqlang/jq/commit/7122866869960b55cea3646bc91334ef55787831https://github.com/jqlang/jq/pull/3539

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Windows Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Mixed 5 releases

Version	Status	Fixed in
trixie	Affected	—
sid	Fixed	`1.8.1-7`
forky	Fixed	`1.8.1-7`
bullseye	Fixed	`1.6-2.1+deb11u3`
bookworm	Fixed	`1.6-2.1+deb12u2`

Application impact

Vendor	Product	Versions	Fixed
jqlang	jq	`{"endExcluding":"1.8.2"}`	`1.8.2`

References

CWEs

CWE-674

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.