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NVD / CVE Program· CNA GitHub_M

CVE-2026-32316: jq: Integer overflow in jvp_string_append() allows Heap-based Buffer Overflow

Noroxi assessment

Priority: Monitor (action score 30/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.79% (FIRST EPSS); higher than 56.5% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: azl3 jq 1.7.1-4 on Azure Linux 3.0 1.7.1-5; cbl2 jq 1.6-5 on CBL Mariner 2.0 1.6-6; cbl2 jq 1.6-5 on CBL-Mariner 2.0 1.6-6.

Low priority for now. Upgrade to azl3 jq 1.7.1-4 on Azure Linux 3.0 1.7.1-5; cbl2 jq 1.6-5 on CBL Mariner 2.0 1.6-6; cbl2 jq 1.6-5 on CBL-Mariner 2.0 1.6-6 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

jq is a command-line JSON processor. An integer overflow vulnerability exists through version 1.8.1 within the jvp_string_append() and jvp_string_copy_replace_bad functions, where concatenating strings with a combined length exceeding 2^31 bytes causes a 32-bit unsigned integer overflow in the buffer allocation size calculation, resulting in a drastically undersized heap buffer. Subsequent memory copy operations then write the full string data into this undersized buffer, causing a heap buffer overflow classified as CWE-190 (Integer Overflow) leading to CWE-122 (Heap-based Buffer Overflow). Any system evaluating untrusted jq queries is affected, as an attacker can crash the process or potentially achieve further exploitation through heap corruption by crafting queries that produce extremely large strings. The root cause is the absence of string size bounds checking, unlike arrays and objects which already have size limits. The issue has been addressed in commit e47e56d226519635768e6aab2f38f0ab037c09e5.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
Apr 13, 2026
Updated
Oct 26, 2026
EPSS
0.7% · 56th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.7%

CISA SSVC decision

Exploitation
proof of concept
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.5
CNA · GitHub_M
8.2
0.7 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-32316

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
jqlangjq

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • jqlang jqup to 1.8.1 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • jqlang jq

    • < e47e56d226519635768e6aab2f38f0ab037c09e5affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.22jqbefore 1.8.2-r01.8.2-r0
Debian:12jqbefore 1.6-2.1+deb12u31.6-2.1+deb12u3
Debian:13jqbefore 1.7.1-6+deb13u31.7.1-6+deb13u3
Debian:14jqbefore 1.8.1-51.8.1-5
openSUSE:Leap 16.0jqbefore 1.7.1-160000.3.11.7.1-160000.3.1
openSUSE:Tumbleweedjqbefore 1.8.1-3.11.8.1-3.1
Red Hat:hummingbird:1jqbefore 0:1.8.1-3.hum10:1.8.1-3.hum1
Red Hat:hummingbird:1jq-develbefore 0:1.8.1-3.hum10:1.8.1-3.hum1
SUSE:Linux Enterprise Micro 5.3jqbefore 1.6-150000.3.20.11.6-150000.3.20.1
SUSE:Linux Micro 6.0jqbefore 1.6-6.11.6-6.1
SUSE:Linux Micro 6.0jqbefore 1.7.1-1.11.7.1-1.1
SUSE:Linux Micro 6.1jqbefore 1.7.1-slfo.1.1_3.11.7.1-slfo.1.1_3.1
SUSE:Linux Micro 6.2jqbefore 1.7.1-160000.3.11.7.1-160000.3.1

Same product

jqlang: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-53427decNumberCopy in decNumber.c in jq through 1.7.1 does not properly consider that NaN is interpreted as numeric, which has a resultant stack-
    32Monitor
  • CVE-2026-40164jq: Algorithmic complexity DoS via hardcoded MurmurHash3 seed
    30Monitor
  • CVE-2025-48060AddressSanitizer: stack-buffer-overflow in jq_fuzz_execute (jv_string_vfmt)
    30Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2025-49014Jun 19, 2025 · jq heap use after free vulnerability in f_strflocaltime
    22Monitor
  • ← EarlierCVE-2025-9403Aug 24, 2025 · jqlang jq JSON jq_test.c run_jq_tests assertion
    7Monitor
  • Later →CVE-2026-33947Apr 13, 2026 · jq: Unbounded Recursion in jv_setpath(), jv_getpath() and delpaths_sorted()
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
azl3 jq 1.7.1-4 on Azure Linux 3.01.7.1-5 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 jq 1.6-5 on CBL Mariner 2.01.6-6 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 jq 1.6-5 on CBL-Mariner 2.01.6-6 · Release NotesMicrosoft (MSRC)
alpine:jq1.8.2-r0 · Alpine:v3.22Package registry (OSV)
debian:jq1.6-2.1+deb12u2 · Debian:12Package registry (OSV)
debian:jq1.6-2.1+deb12u3 · Debian:12Package registry (OSV)
opensuse:jq1.8.1-3.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:jq0:1.8.1-3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:jq-devel0:1.8.1-3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
suse:jq1.7.1-160000.3.1 · SUSE:Linux Micro 6.2Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-122 · Heap-based Buffer Overflow

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records