CVE-2023-49355

decToString in decNumber/decNumber.c in jq 88f01a7 has a one-byte out-of-bounds write via the " [...

7.5 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

1.17%Up 1.1 points since Dec 11, 2023

What each source reports

NVD Score used 7.5

Record: CVE-2023-49355
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-787
Updated: 2026-11-02

CVE List 7.5

Record: CVE-2023-49355
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-787
Updated: 2026-11-02

EUVDEUVD-2023-53338 7.5

Record: EUVD-2023-53338
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-4c3j-f924-rc7v 7.5

decToString in decNumber/decNumber.c in jq 88f01a7 has a one-byte out-of-bounds write via the " [...

decToString in decNumber/decNumber.c in jq 88f01a7 has a one-byte out-of-bounds write via the " []-1.2e-1111111111" input.

Record: GHSA-4c3j-f924-rc7v
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-787
Updated: 2026-11-02

OSV 7.5

Record: CVE-2023-49355
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2023-49355 7.5

Record: DEBIAN-CVE-2023-49355
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2023-49355 7.5

Record: UBUNTU-CVE-2023-49355
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

jqlang jq

Affected packages

Affected packages
Package	Affected	Fixed
`jq` Debian:13	before 1.7.1-1	1.7.1-1
`jq` Debian:14	before 1.7.1-1	1.7.1-1

History

History
Recorded	Changed	Sources
Nov 3, 2026	affected
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-49355 is a high vulnerability (CVSS 7.5) in Jqlang Jq, published December 11, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.17%, the 67th percentile. Fixed in jq 1.7.1-1.