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Vulnerability record · CVE-2023-49355 · published 11 December 2023

CVE-2023-49355: Jqlang jq out-of-bounds write vulnerability

Jqlang · Jq

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.

7.5 CVSS 3.1 High EPSS 1.2% · top 33.9% CWE-787 · Out-of-bounds write
7.5CVSS 3.1 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/jqlang/jq/blob/88f01a741c8d63c4d1b5bc3ef61520c6eb93edaa/src/decNumber/decNumber.c#L3764 Product
https://github.com/jqlang/jq/tree/88f01a741c8d63c4d1b5bc3ef61520c6eb93edaa Patch
https://github.com/linzc21/bug-reports/blob/main/reports/jq/1.7-37-g88f01a7/heap-buffer-overflow/CVE-2023-49355.md Exploit
https://github.com/jqlang/jq/blob/88f01a741c8d63c4d1b5bc3ef61520c6eb93edaa/src/decNumber/decNumber.c#L3764 Product
https://github.com/jqlang/jq/tree/88f01a741c8d63c4d1b5bc3ef61520c6eb93edaa Patch
https://github.com/linzc21/bug-reports/blob/main/reports/jq/1.7-37-g88f01a7/heap-buffer-overflow/CVE-2023-49355.md Exploit

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-49355), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.