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14 vulnerabilities by jqlang
CVE-2026-33948 (GCVE-0-2026-33948)
Vulnerability from cvelistv5 – Published: 2026-04-13 23:51 – Updated: 2026-04-14 15:53
VLAI?
Title
jq: Embedded-NUL Truncation in CLI JSON Input Path Causes Prefix-Only Validation of Malformed Input
Summary
jq is a command-line JSON processor. Commits before 6374ae0bcdfe33a18eb0ae6db28493b1f34a0a5b contain a vulnerability where CLI input parsing allows validation bypass via embedded NUL bytes. When reading JSON from files or stdin, jq uses strlen() to determine buffer length instead of the actual byte count from fgets(), causing it to truncate input at the first NUL byte and parse only the preceding prefix. This enables an attacker to craft input with a benign JSON prefix before a NUL byte followed by malicious trailing data, where jq validates only the prefix as valid JSON while silently discarding the suffix. Workflows relying on jq to validate untrusted JSON before forwarding it to downstream consumers are susceptible to parser differential attacks, as those consumers may process the full input including the malicious trailing bytes. This issue has been patched by commit 6374ae0bcdfe33a18eb0ae6db28493b1f34a0a5b.
Severity ?
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
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CVE-2026-40164 (GCVE-0-2026-40164)
Vulnerability from cvelistv5 – Published: 2026-04-13 23:40 – Updated: 2026-04-13 23:40
VLAI?
Title
jq: Algorithmic complexity DoS via hardcoded MurmurHash3 seed
Summary
jq is a command-line JSON processor. Before commit 0c7d133c3c7e37c00b6d46b658a02244fdd3c784, jq used MurmurHash3 with a hardcoded, publicly visible seed (0x432A9843) for all JSON object hash table operations, which allowed an attacker to precompute key collisions offline. By supplying a crafted JSON object (~100 KB) where all keys hashed to the same bucket, hash table lookups degraded from O(1) to O(n), turning any jq expression into an O(n²) operation and causing significant CPU exhaustion. This affected common jq use cases such as CI/CD pipelines, web services, and data processing scripts, and was far more practical to exploit than existing heap overflow issues since it required only a small payload. This issue has been patched in commit 0c7d133c3c7e37c00b6d46b658a02244fdd3c784.
Severity ?
7.5 (High)
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
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CVE-2026-39979 (GCVE-0-2026-39979)
Vulnerability from cvelistv5 – Published: 2026-04-13 22:18 – Updated: 2026-04-14 13:43
VLAI?
Title
jq: Out-of-Bounds Read in jv_parse_sized() Error Formatting for Non-NUL-Terminated Counted Buffers
Summary
jq is a command-line JSON processor. In commits before 2f09060afab23fe9390cce7cb860b10416e1bf5f, the jv_parse_sized() API in libjq accepts a counted buffer with an explicit length parameter, but its error-handling path formats the input buffer using %s in jv_string_fmt(), which reads until a NUL terminator is found rather than respecting the caller-supplied length. This means that when malformed JSON is passed in a non-NUL-terminated buffer, the error construction logic performs an out-of-bounds read past the end of the buffer. The vulnerability is reachable by any libjq consumer calling jv_parse_sized() with untrusted input, and depending on memory layout, can result in memory disclosure or process termination. The issue has been patched in commit 2f09060afab23fe9390cce7cb860b10416e1bf5f.
Severity ?
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
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CVE-2026-39956 (GCVE-0-2026-39956)
Vulnerability from cvelistv5 – Published: 2026-04-13 22:10 – Updated: 2026-04-14 16:28
VLAI?
Title
jq: Missing runtime type checks for _strindices lead to crash and limited memory disclosure
Summary
jq is a command-line JSON processor. In commits after 69785bf77f86e2ea1b4a20ca86775916889e91c9, the _strindices builtin in jq's src/builtin.c passes its arguments directly to jv_string_indexes() without verifying they are strings, and jv_string_indexes() in src/jv.c relies solely on assert() checks that are stripped in release builds compiled with -DNDEBUG. This allows an attacker to crash jq trivially with input like _strindices(0), and by crafting a numeric value whose IEEE-754 bit pattern maps to a chosen pointer, achieve a controlled pointer dereference and limited memory read/probe primitive. Any deployment that evaluates untrusted jq filters against a release build is vulnerable. This issue has been patched in commit fdf8ef0f0810e3d365cdd5160de43db46f57ed03.
Severity ?
6.1 (Medium)
CWE
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
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CVE-2026-33947 (GCVE-0-2026-33947)
Vulnerability from cvelistv5 – Published: 2026-04-13 21:50 – Updated: 2026-04-14 13:45
VLAI?
Title
jq: Unbounded Recursion in jv_setpath(), jv_getpath() and delpaths_sorted()
Summary
jq is a command-line JSON processor. In versions 1.8.1 and below, functions jv_setpath(), jv_getpath(), and delpaths_sorted() in jq's src/jv_aux.c use unbounded recursion whose depth is controlled by the length of a caller-supplied path array, with no depth limit enforced. An attacker can supply a JSON document containing a flat array of ~65,000 integers (~200 KB) that, when used as a path argument by a trusted jq filter, exhausts the C call stack and crashes the process with a segmentation fault (SIGSEGV). This bypass works because the existing MAX_PARSING_DEPTH (10,000) limit only protects the JSON parser, not runtime path operations where arrays can be programmatically constructed to arbitrary lengths. The impact is denial of service (unrecoverable crash) affecting any application or service that processes untrusted JSON input through jq's setpath, getpath, or delpaths builtins. This issue has been addressed in commit fb59f1491058d58bdc3e8dd28f1773d1ac690a1f.
Severity ?
6.2 (Medium)
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
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CVE-2026-32316 (GCVE-0-2026-32316)
Vulnerability from cvelistv5 – Published: 2026-04-13 17:49 – Updated: 2026-04-13 18:56
VLAI?
Title
jq: Integer overflow in jvp_string_append() allows Heap-based Buffer Overflow
Summary
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.
Severity ?
8.2 (High)
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
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CVE-2025-9403 (GCVE-0-2025-9403)
Vulnerability from cvelistv5 – Published: 2025-08-25 02:02 – Updated: 2025-08-25 16:48
VLAI?
Title
jqlang jq JSON jq_test.c run_jq_tests assertion
Summary
A vulnerability was determined in jqlang jq up to 1.6. Impacted is the function run_jq_tests of the file jq_test.c of the component JSON Parser. Executing manipulation can lead to reachable assertion. The attack requires local access. The exploit has been publicly disclosed and may be utilized. Other versions might be affected as well.
Severity ?
CWE
- CWE-617 - Reachable Assertion
Assigner
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
Impacted products
Credits
xdcao (VulDB User)
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CVE-2025-49014 (GCVE-0-2025-49014)
Vulnerability from cvelistv5 – Published: 2025-06-19 15:08 – Updated: 2025-06-23 17:38
VLAI?
Title
jq heap use after free vulnerability in f_strflocaltime
Summary
jq is a command-line JSON processor. In version 1.8.0 a heap use after free vulnerability exists within the function f_strflocaltime of /src/builtin.c. This issue has been patched in commit 499c91b, no known fix version exists at time of publication.
Severity ?
CWE
- CWE-416 - Use After Free
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
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CVE-2025-48060 (GCVE-0-2025-48060)
Vulnerability from cvelistv5 – Published: 2025-05-21 17:32 – Updated: 2025-11-03 18:12
VLAI?
Title
AddressSanitizer: stack-buffer-overflow in jq_fuzz_execute (jv_string_vfmt)
Summary
jq is a command-line JSON processor. In versions up to and including 1.7.1, a heap-buffer-overflow is present in function `jv_string_vfmt` in the jq_fuzz_execute harness from oss-fuzz. This crash happens on file jv.c, line 1456 `void* p = malloc(sz);`. As of time of publication, no patched versions are available.
Severity ?
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
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CVE-2024-23337 (GCVE-0-2024-23337)
Vulnerability from cvelistv5 – Published: 2025-05-21 14:34 – Updated: 2025-05-21 14:57
VLAI?
Title
jq has signed integer overflow in jv.c:jvp_array_write
Summary
jq is a command-line JSON processor. In versions up to and including 1.7.1, an integer overflow arises when assigning value using an index of 2147483647, the signed integer limit. This causes a denial of service. Commit de21386681c0df0104a99d9d09db23a9b2a78b1e contains a patch for the issue.
Severity ?
4.3 (Medium)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
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|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2024-53427 (GCVE-0-2024-53427)
Vulnerability from cvelistv5 – Published: 2025-02-26 00:00 – Updated: 2025-03-28 16:39
VLAI?
Summary
decNumberCopy in decNumber.c in jq through 1.7.1 does not properly consider that NaN is interpreted as numeric, which has a resultant stack-based buffer overflow and out-of-bounds write, as demonstrated by use of --slurp with subtraction, such as a filter of .-. when the input has a certain form of digit string with NaN (e.g., "1 NaN123" immediately followed by many more digits).
Severity ?
8.1 (High)
CWE
- CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')
Assigner
References
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CVE-2023-50268 (GCVE-0-2023-50268)
Vulnerability from cvelistv5 – Published: 2023-12-13 20:49 – Updated: 2025-02-13 17:19
VLAI?
Title
jq has stack-based buffer overflow in decNaNs
Summary
jq is a command-line JSON processor. Version 1.7 is vulnerable to stack-based buffer overflow in builds using decNumber. Version 1.7.1 contains a patch for this issue.
Severity ?
6.2 (Medium)
CWE
Assigner
References
| URL | Tags | ||||||||||||||||
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CVE-2023-50246 (GCVE-0-2023-50246)
Vulnerability from cvelistv5 – Published: 2023-12-13 20:43 – Updated: 2025-02-13 17:19
VLAI?
Title
jq has heap-buffer-overflow vulnerability in the function decToString in decNumber.c
Summary
jq is a command-line JSON processor. Version 1.7 is vulnerable to heap-based buffer overflow. Version 1.7.1 contains a patch for this issue.
Severity ?
6.2 (Medium)
CWE
Assigner
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"title": "jq has heap-buffer-overflow vulnerability in the function decToString in decNumber.c"
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CVE-2023-49355 (GCVE-0-2023-49355)
Vulnerability from cvelistv5 – Published: 2023-12-11 00:00 – Updated: 2024-10-09 14:35
VLAI?
Summary
decToString in decNumber/decNumber.c in jq 88f01a7 has a one-byte out-of-bounds write via the " []-1.2e-1111111111" input. NOTE: this is not the same as CVE-2023-50246. The CVE-2023-50246 71c2ab5 reference mentions -10E-1000010001, which is not in normalized scientific notation.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
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