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CVE-2026-16554 (GCVE-0-2026-16554)

Vulnerability from nvd – Published: 2026-07-27 08:40 – Updated: 2026-07-27 10:24 X_Open Source

Title

Integer Overflow Leading to Heap Buffer Overflow in cJSON

Summary

cJSON library is vulnerable to an integer overflow in the print_string_ptr() function in cJSON.c on 32-bit platforms. The escape_characters counter, a 32-bit size_t, can wrap around when processing strings containing approximately 858,993,460 or more control characters, causing the output buffer to be allocated based on an underestimated length. When cJSON_PrintBuffered() is used with a pre-allocated buffer, the subsequent write loop overflows the heap allocation. An attacker supplying a crafted JSON string to an application using cJSON on a 32-bit platform can cause a heap buffer overflow, potentially leading to remote code execution, information disclosure, or denial of service. Because project creator contact attempts were unsuccessful, the vulnerability has only been confirmed in version 1.7.19 but may also affect other versions.

Severity

5.1 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-190 - Integer overflow or wraparound

Assigner

CERT-PL

References

2 references

URL	Tags
https://cert.pl/en/posts/2026/07/CVE-2026-16554	third-party-advisory
https://github.com/DaveGamble/cJSON	product

Impacted products

1 product

Vendor	Product	Version
DaveGamble	cJSON	Affected: 1.7.19 (semver)

Credits

Michał Majchrowicz (AFINE Team) Marcin Wyczechowski (AFINE Team)

Show details on NVD website

JSON

To clipboard

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CVE-2025-57052 (GCVE-0-2025-57052)

Vulnerability from nvd – Published: 2025-09-03 00:00 – Updated: 2025-11-03 18:13

Summary

cJSON 1.5.0 through 1.7.18 allows out-of-bounds access via the decode_array_index_from_pointer function in cJSON_Utils.c, allowing remote attackers to bypass array bounds checking and access restricted data via malformed JSON pointer strings containing alphanumeric characters.

Severity

9.8 (Critical)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-129 - Improper Validation of Array Index
CWE-125 - Out-of-bounds Read

Assigner

mitre

References

2 references

URL	Tags
https://x-0r.com/posts/cJSON-Array-Index-Parsing-…
https://lists.debian.org/debian-lts-announce/2025…

Show details on NVD website

JSON

To clipboard

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CVE-2023-50472 (GCVE-0-2023-50472)

Vulnerability from nvd – Published: 2023-12-14 00:00 – Updated: 2024-08-28 14:15

Summary

cJSON v1.7.16 was discovered to contain a segmentation violation via the function cJSON_SetValuestring at cJSON.c.

Severity

No CVSS data available.

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/DaveGamble/cJSON/issues/803

Show details on NVD website

JSON

To clipboard

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CVE-2023-50471 (GCVE-0-2023-50471)

Vulnerability from nvd – Published: 2023-12-14 00:00 – Updated: 2025-11-04 22:05

Summary

cJSON v1.7.16 was discovered to contain a segmentation violation via the function cJSON_InsertItemInArray at cJSON.c.

Severity

No CVSS data available.

CWE

n/a

Assigner

mitre

References

8 references

URL	Tags
https://github.com/DaveGamble/cJSON/issues/802
https://lists.debian.org/debian-lts-announce/2023…	mailing-list
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…

Show details on NVD website

JSON

To clipboard

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CVE-2019-1010239 (GCVE-0-2019-1010239)

Vulnerability from nvd – Published: 2019-07-19 16:41 – Updated: 2024-08-05 03:07

Summary

DaveGamble/cJSON cJSON 1.7.8 is affected by: Improper Check for Unusual or Exceptional Conditions. The impact is: Null dereference, so attack can cause denial of service. The component is: cJSON_GetObjectItemCaseSensitive() function. The attack vector is: crafted json file. The fixed version is: 1.7.9 and later.

Severity

No CVSS data available.

CWE

Improper Check for Unusual or Exceptional Conditions

Assigner

dwf

References

3 references

URL	Tags
https://www.oracle.com/security-alerts/cpuoct2020.html	x_refsource_MISC
https://github.com/DaveGamble/cJSON/issues/315	x_refsource_MISC
https://github.com/DaveGamble/cJSON/commit/be749d…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
DaveGamble/cJSON	cJSON	Affected: 1.7.8 [fixed: 1.7.9 and later]

Show details on NVD website

JSON

To clipboard

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CVE-2019-11835 (GCVE-0-2019-11835)

Vulnerability from nvd – Published: 2019-05-09 04:38 – Updated: 2024-08-04 23:03

Summary

cJSON before 1.7.11 allows out-of-bounds access, related to multiline comments.

Severity

No CVSS data available.

CWE

n/a

Assigner

mitre

References

4 references

URL	Tags
https://www.oracle.com/security-alerts/cpuoct2020.html	x_refsource_MISC
https://github.com/DaveGamble/cJSON/releases/tag/…	x_refsource_MISC
https://github.com/DaveGamble/cJSON/compare/c6913…	x_refsource_MISC
https://github.com/DaveGamble/cJSON/issues/338	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

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CVE-2019-11834 (GCVE-0-2019-11834)

Vulnerability from nvd – Published: 2019-05-09 04:38 – Updated: 2024-08-04 23:03

Summary

cJSON before 1.7.11 allows out-of-bounds access, related to \x00 in a string literal.

Severity

No CVSS data available.

CWE

n/a

Assigner

mitre

References

4 references

URL	Tags
https://www.oracle.com/security-alerts/cpuoct2020.html	x_refsource_MISC
https://github.com/DaveGamble/cJSON/issues/337	x_refsource_MISC
https://github.com/DaveGamble/cJSON/releases/tag/…	x_refsource_MISC
https://github.com/DaveGamble/cJSON/compare/c6913…	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

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CVE-2016-10749 (GCVE-0-2016-10749)

Vulnerability from nvd – Published: 2019-04-29 13:46 – Updated: 2024-08-06 03:30

Summary

parse_string in cJSON.c in cJSON before 2016-10-02 has a buffer over-read, as demonstrated by a string that begins with a " character and ends with a \ character.

Severity

No CVSS data available.

CWE

n/a

Assigner

mitre

References

3 references

URL	Tags
https://github.com/DaveGamble/cJSON/issues/30	x_refsource_MISC
https://www.openwall.com/lists/oss-security/2016/…	x_refsource_MISC
https://github.com/DaveGamble/cJSON/commit/94df77…	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

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CVE-2018-1000217 (GCVE-0-2018-1000217)

Vulnerability from nvd – Published: 2018-08-20 20:00 – Updated: 2024-09-16 22:45

Summary

Dave Gamble cJSON version 1.7.3 and earlier contains a CWE-416: Use After Free vulnerability in cJSON library that can result in Possible crash, corruption of data or even RCE. This attack appear to be exploitable via Depends on how application uses cJSON library. If application provides network interface then can be exploited over a network, otherwise just local.. This vulnerability appears to have been fixed in 1.7.4.

Severity

No CVSS data available.

CWE

n/a

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/DaveGamble/cJSON/issues/248	x_refsource_CONFIRM

Show details on NVD website

JSON

To clipboard

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CVE-2018-1000215 (GCVE-0-2018-1000215)

Vulnerability from nvd – Published: 2018-08-20 20:00 – Updated: 2024-09-16 20:52

Summary

Dave Gamble cJSON version 1.7.6 and earlier contains a CWE-772 vulnerability in cJSON library that can result in Denial of Service (DoS). This attack appear to be exploitable via If the attacker can force the data to be printed and the system is in low memory it can force a leak of memory. This vulnerability appears to have been fixed in 1.7.7.

Severity

No CVSS data available.

CWE

n/a

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/DaveGamble/cJSON/issues/267	x_refsource_CONFIRM

Show details on NVD website

JSON

To clipboard

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CVE-2018-1000216 (GCVE-0-2018-1000216)

Vulnerability from nvd – Published: 2018-08-20 20:00 – Updated: 2024-09-17 03:43

Summary

Dave Gamble cJSON version 1.7.2 and earlier contains a CWE-415: Double Free vulnerability in cJSON library that can result in Possible crash or RCE. This attack appear to be exploitable via Attacker must be able to force victim to print JSON data, depending on how cJSON library is used this could be either local or over a network. This vulnerability appears to have been fixed in 1.7.3.

Severity

No CVSS data available.

CWE

n/a

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/DaveGamble/cJSON/issues/241	x_refsource_CONFIRM

Show details on NVD website

JSON

To clipboard

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CVE-2026-16554 (GCVE-0-2026-16554)

Vulnerability from cvelistv5 – Published: 2026-07-27 08:40 – Updated: 2026-07-27 10:24 X_Open Source

Title

Integer Overflow Leading to Heap Buffer Overflow in cJSON

Summary

cJSON library is vulnerable to an integer overflow in the print_string_ptr() function in cJSON.c on 32-bit platforms. The escape_characters counter, a 32-bit size_t, can wrap around when processing strings containing approximately 858,993,460 or more control characters, causing the output buffer to be allocated based on an underestimated length. When cJSON_PrintBuffered() is used with a pre-allocated buffer, the subsequent write loop overflows the heap allocation. An attacker supplying a crafted JSON string to an application using cJSON on a 32-bit platform can cause a heap buffer overflow, potentially leading to remote code execution, information disclosure, or denial of service. Because project creator contact attempts were unsuccessful, the vulnerability has only been confirmed in version 1.7.19 but may also affect other versions.

Severity

5.1 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-190 - Integer overflow or wraparound

Assigner

CERT-PL

References

2 references

URL	Tags
https://cert.pl/en/posts/2026/07/CVE-2026-16554	third-party-advisory
https://github.com/DaveGamble/cJSON	product

Impacted products

1 product

Vendor	Product	Version
DaveGamble	cJSON	Affected: 1.7.19 (semver)

Credits

Michał Majchrowicz (AFINE Team) Marcin Wyczechowski (AFINE Team)

Show details on NVD website

JSON

To clipboard

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CVE-2025-57052 (GCVE-0-2025-57052)

Vulnerability from cvelistv5 – Published: 2025-09-03 00:00 – Updated: 2025-11-03 18:13

Summary

cJSON 1.5.0 through 1.7.18 allows out-of-bounds access via the decode_array_index_from_pointer function in cJSON_Utils.c, allowing remote attackers to bypass array bounds checking and access restricted data via malformed JSON pointer strings containing alphanumeric characters.

Severity

9.8 (Critical)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

n/a
CWE-129 - Improper Validation of Array Index
CWE-125 - Out-of-bounds Read

Assigner

mitre

References

2 references

URL	Tags
https://x-0r.com/posts/cJSON-Array-Index-Parsing-…
https://lists.debian.org/debian-lts-announce/2025…

Show details on NVD website

JSON

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              "baseScore": 9.8,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
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CVE-2023-50471 (GCVE-0-2023-50471)

Vulnerability from cvelistv5 – Published: 2023-12-14 00:00 – Updated: 2025-11-04 22:05

Summary

cJSON v1.7.16 was discovered to contain a segmentation violation via the function cJSON_InsertItemInArray at cJSON.c.

Severity

No CVSS data available.

CWE

n/a

Assigner

mitre

References

8 references

URL	Tags
https://github.com/DaveGamble/cJSON/issues/802
https://lists.debian.org/debian-lts-announce/2023…	mailing-list
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…

Show details on NVD website

JSON

To clipboard

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CVE-2023-50472 (GCVE-0-2023-50472)

Vulnerability from cvelistv5 – Published: 2023-12-14 00:00 – Updated: 2024-08-28 14:15

Summary

cJSON v1.7.16 was discovered to contain a segmentation violation via the function cJSON_SetValuestring at cJSON.c.

Severity

No CVSS data available.

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

n/a

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/DaveGamble/cJSON/issues/803

Show details on NVD website

JSON

To clipboard

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CVE-2019-1010239 (GCVE-0-2019-1010239)

Vulnerability from cvelistv5 – Published: 2019-07-19 16:41 – Updated: 2024-08-05 03:07

Summary

DaveGamble/cJSON cJSON 1.7.8 is affected by: Improper Check for Unusual or Exceptional Conditions. The impact is: Null dereference, so attack can cause denial of service. The component is: cJSON_GetObjectItemCaseSensitive() function. The attack vector is: crafted json file. The fixed version is: 1.7.9 and later.

Severity

No CVSS data available.

CWE

Improper Check for Unusual or Exceptional Conditions

Assigner

dwf

References

3 references

URL	Tags
https://www.oracle.com/security-alerts/cpuoct2020.html	x_refsource_MISC
https://github.com/DaveGamble/cJSON/issues/315	x_refsource_MISC
https://github.com/DaveGamble/cJSON/commit/be749d…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
DaveGamble/cJSON	cJSON	Affected: 1.7.8 [fixed: 1.7.9 and later]

Show details on NVD website

JSON

To clipboard

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CVE-2019-11835 (GCVE-0-2019-11835)

Vulnerability from cvelistv5 – Published: 2019-05-09 04:38 – Updated: 2024-08-04 23:03

Summary

cJSON before 1.7.11 allows out-of-bounds access, related to multiline comments.

Severity

No CVSS data available.

CWE

n/a

Assigner

mitre

References

4 references

URL	Tags
https://www.oracle.com/security-alerts/cpuoct2020.html	x_refsource_MISC
https://github.com/DaveGamble/cJSON/releases/tag/…	x_refsource_MISC
https://github.com/DaveGamble/cJSON/compare/c6913…	x_refsource_MISC
https://github.com/DaveGamble/cJSON/issues/338	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

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CVE-2019-11834 (GCVE-0-2019-11834)

Vulnerability from cvelistv5 – Published: 2019-05-09 04:38 – Updated: 2024-08-04 23:03

Summary

cJSON before 1.7.11 allows out-of-bounds access, related to \x00 in a string literal.

Severity

No CVSS data available.

CWE

n/a

Assigner

mitre

References

4 references

URL	Tags
https://www.oracle.com/security-alerts/cpuoct2020.html	x_refsource_MISC
https://github.com/DaveGamble/cJSON/issues/337	x_refsource_MISC
https://github.com/DaveGamble/cJSON/releases/tag/…	x_refsource_MISC
https://github.com/DaveGamble/cJSON/compare/c6913…	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

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CVE-2016-10749 (GCVE-0-2016-10749)

Vulnerability from cvelistv5 – Published: 2019-04-29 13:46 – Updated: 2024-08-06 03:30

Summary

parse_string in cJSON.c in cJSON before 2016-10-02 has a buffer over-read, as demonstrated by a string that begins with a " character and ends with a \ character.

Severity

No CVSS data available.

CWE

n/a

Assigner

mitre

References

3 references

URL	Tags
https://github.com/DaveGamble/cJSON/issues/30	x_refsource_MISC
https://www.openwall.com/lists/oss-security/2016/…	x_refsource_MISC
https://github.com/DaveGamble/cJSON/commit/94df77…	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

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CVE-2018-1000217 (GCVE-0-2018-1000217)

Vulnerability from cvelistv5 – Published: 2018-08-20 20:00 – Updated: 2024-09-16 22:45

Summary

Dave Gamble cJSON version 1.7.3 and earlier contains a CWE-416: Use After Free vulnerability in cJSON library that can result in Possible crash, corruption of data or even RCE. This attack appear to be exploitable via Depends on how application uses cJSON library. If application provides network interface then can be exploited over a network, otherwise just local.. This vulnerability appears to have been fixed in 1.7.4.

Severity

No CVSS data available.

CWE

n/a

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/DaveGamble/cJSON/issues/248	x_refsource_CONFIRM

Show details on NVD website

JSON

To clipboard

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CVE-2018-1000215 (GCVE-0-2018-1000215)

Vulnerability from cvelistv5 – Published: 2018-08-20 20:00 – Updated: 2024-09-16 20:52

Summary

Dave Gamble cJSON version 1.7.6 and earlier contains a CWE-772 vulnerability in cJSON library that can result in Denial of Service (DoS). This attack appear to be exploitable via If the attacker can force the data to be printed and the system is in low memory it can force a leak of memory. This vulnerability appears to have been fixed in 1.7.7.

Severity

No CVSS data available.

CWE

n/a

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/DaveGamble/cJSON/issues/267	x_refsource_CONFIRM

Show details on NVD website

JSON

To clipboard

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CVE-2018-1000216 (GCVE-0-2018-1000216)

Vulnerability from cvelistv5 – Published: 2018-08-20 20:00 – Updated: 2024-09-17 03:43

Summary

Dave Gamble cJSON version 1.7.2 and earlier contains a CWE-415: Double Free vulnerability in cJSON library that can result in Possible crash or RCE. This attack appear to be exploitable via Attacker must be able to force victim to print JSON data, depending on how cJSON library is used this could be either local or over a network. This vulnerability appears to have been fixed in 1.7.3.

Severity

No CVSS data available.

CWE

n/a

Assigner

mitre

References

1 reference

URL	Tags
https://github.com/DaveGamble/cJSON/issues/241	x_refsource_CONFIRM

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22 vulnerabilities by DaveGamble

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CVE-2018-1000217 (GCVE-0-2018-1000217)

CVE-2018-1000215 (GCVE-0-2018-1000215)

CVE-2018-1000216 (GCVE-0-2018-1000216)

CVE-2026-16554 (GCVE-0-2026-16554)

CVE-2025-57052 (GCVE-0-2025-57052)

CVE-2023-50471 (GCVE-0-2023-50471)

CVE-2023-50472 (GCVE-0-2023-50472)

CVE-2019-1010239 (GCVE-0-2019-1010239)

CVE-2019-11835 (GCVE-0-2019-11835)

CVE-2019-11834 (GCVE-0-2019-11834)

CVE-2016-10749 (GCVE-0-2016-10749)

CVE-2018-1000217 (GCVE-0-2018-1000217)

CVE-2018-1000215 (GCVE-0-2018-1000215)

CVE-2018-1000216 (GCVE-0-2018-1000216)

Find a vulnerability

Search criteria ⓘ Use this form to refine search results. Full-text search supports keyword queries with ranking and filtering. You can combine vendor, product, and sources to narrow results. Enable “Apply ordering” to sort by date instead of relevance.

22 vulnerabilities by DaveGamble

CVE-2026-16554 (GCVE-0-2026-16554)

CVE-2025-57052 (GCVE-0-2025-57052)

CVE-2023-50472 (GCVE-0-2023-50472)

CVE-2023-50471 (GCVE-0-2023-50471)

CVE-2019-1010239 (GCVE-0-2019-1010239)

CVE-2019-11835 (GCVE-0-2019-11835)

CVE-2019-11834 (GCVE-0-2019-11834)

CVE-2016-10749 (GCVE-0-2016-10749)

CVE-2018-1000217 (GCVE-0-2018-1000217)

CVE-2018-1000215 (GCVE-0-2018-1000215)

CVE-2018-1000216 (GCVE-0-2018-1000216)

CVE-2026-16554 (GCVE-0-2026-16554)

CVE-2025-57052 (GCVE-0-2025-57052)

CVE-2023-50471 (GCVE-0-2023-50471)

CVE-2023-50472 (GCVE-0-2023-50472)

CVE-2019-1010239 (GCVE-0-2019-1010239)

CVE-2019-11835 (GCVE-0-2019-11835)

CVE-2019-11834 (GCVE-0-2019-11834)

CVE-2016-10749 (GCVE-0-2016-10749)

CVE-2018-1000217 (GCVE-0-2018-1000217)

CVE-2018-1000215 (GCVE-0-2018-1000215)

CVE-2018-1000216 (GCVE-0-2018-1000216)

Search criteria ⓘ Use this form to refine search results.
Full-text search supports keyword queries with ranking and filtering.
You can combine vendor, product, and sources to narrow results.
Enable “Apply ordering” to sort by date instead of relevance.