DSA-6416-1 jq - security update
Multiple security issues were discovered in jq, a command-line JSON processor, which could result in denial of service or potentially the execution of arbitrary code when processing untrusted input. This update additionally addresses three issues for which no CVE has been assigned: GHSA-ggc9-rpv2-xgpm, GHSA-gvwx-xj9r-3frq and GHSA-gf4g-95wj-4q4r. Two changes in behaviour follow from the fixes above. An operation whose result would exceed the internal string length limit, such as repeating or escaping a very large string, now terminates with the error "String too long" instead of returning a truncated result. A comparison or containment check on a deeply nested value now reports an error rather than recursing until the stack is exhausted. Filters relying on the previous behaviour will report an error where they previously appeared to succeed. https://security-tracker.debian.org/tracker/DSA-6416-1
CSIRTS triage
- What
- Multiple security issues in the JSON processor jq including denial of service and potential arbitrary code execution when processing untrusted input.
- Who is affected
- Systems using jq to process untrusted JSON data.
- Urgency
- High priority as malicious JSON input can trigger denial of service or code execution.
- Action
- Apply Debian security update DSA-6416-1 to jq; review filters for compatibility with new string length and nesting depth error handling.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://lists.debian.org/debian-security-announce/2026/msg00327.html
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2024-534270.36% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 29% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-323160.48% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 40% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-406120.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-412560.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-412570.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-438940.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-438950.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-438960.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-447770.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-477700.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2024-53427 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-32316 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-40612 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-41256 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-41257 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-43894 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-43895 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-43896 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-44777 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-47770 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-49839 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-54679 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- medium[UPDATE] [medium] jq: Vulnerability allows denial of servicecert-bund
- medium[UPDATE] [medium] jq: Vulnerability allows unspecified attackcert-bund
- medium[UPDATE] [medium] jq: Multiple vulnerabilities allow Denial of Servicecert-bund
- high[UPDATE] [high] jq: Multiple vulnerabilitiescert-bund
- medium[UPDATE] [medium] jq: Vulnerability allows bypassing security measurescert-bund
- medium[UPDATE] [medium] jq: Vulnerability allows denial of servicecert-bund
- medium[UPDATE] [medium] jq: Vulnerability allows denial of servicecert-bund
- mediumCVE-2026-54679: jq: potential integer overflow in jvp_string_appendmsrc
- highCVE-2026-49839: jq --rawfile invalid-state reuse after String too long causes heap-buffer-overflowmsrc
- mediumCVE-2026-47770: jq: stack overflow in deep structural equalitymsrc
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