Every CVESearch/Get API key

CVE-2026-88358

simdjson 4.6.1 contains a one-byte out-of-bounds read vulnerability in dom::parser:...

6.5 MediumFix available

simdjson 4.6.1 contains a one-byte out-of-bounds read vulnerability in dom::parser::parse_unpadded(). A specially crafted truncated JSON document whose final structural token closes a nested array or object can cause json_iterator::walk_document() to access buf[len] after the input buffer has been exhausted. This results in a heap out-of-bounds read and may cause application termination, leading to denial of service.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.39%Up 0.2 points since Sep 25, 2026
90%50%10%1%

What each source reports

CVE List Score used6.5

simdjson 4.6.1 contains a one-byte out-of-bounds read vulnerability in dom::parser::parse_unpadded(). A specially crafted truncated JSON document whose final structural token closes a nested array or object can cause json_iterator::walk_document() to access buf[len] after the input buffer has been exhausted. This results in a heap out-of-bounds read and may cause application termination, leading to denial of service.

Record
CVE-2026-88358
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-125
Updated
2026-11-02
EUVDEUVD-2026-862846.5

simdjson 4.6.1 contains a one-byte out-of-bounds read vulnerability in dom::parser::parse_unpadded(). A specially crafted truncated JSON document whose final structural token closes a nested array or object can cause json_iterator::walk_document() to access buf[len] after the input buffer has been exhausted. This results in a heap out-of-bounds read and may cause application termination, leading to denial of service.

Record
EUVD-2026-86284
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-w8jv-57mm-83966.5

simdjson 4.6.1 contains a one-byte out-of-bounds read vulnerability in dom::parser:...

simdjson 4.6.1 contains a one-byte out-of-bounds read vulnerability in dom::parser::parse_unpadded(). A specially crafted truncated JSON document whose final structural token closes a nested array or object can cause json_iterator::walk_document() to access buf[len] after the input buffer has been exhausted. This results in a heap out-of-bounds read and may cause application termination, leading to denial of service.

Record
GHSA-w8jv-57mm-8396
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-125
Updated
2026-11-02
NVD6.5

simdjson 4.6.1 contains a one-byte out-of-bounds read vulnerability in dom::parser::parse_unpadded(). A specially crafted truncated JSON document whose final structural token closes a nested array or object can cause json_iterator::walk_document() to access buf[len] after the input buffer has been exhausted. This results in a heap out-of-bounds read and may cause application termination, leading to denial of service.

Record
CVE-2026-88358
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-125
Updated
2026-11-02
OSVBELL-CVE-2026-883586.5
Record
BELL-CVE-2026-88358
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSV6.5

simdjson 4.6.1 contains a one-byte out-of-bounds read vulnerability in dom::parser::parse_unpadded(). A specially crafted truncated JSON document whose final structural token closes a nested array or object can cause json_iterator::walk_document() to access buf[len] after the input buffer has been exhausted. This results in a heap out-of-bounds read and may cause application termination, leading to denial of service.

Record
CVE-2026-88358
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2026-883586.5

simdjson 4.6.1 contains a one-byte out-of-bounds read vulnerability in dom::parser::parse_unpadded(). A specially crafted truncated JSON document whose final structural token closes a nested array or object can cause json_iterator::walk_document() to access buf[len] after the input buffer has been exhausted. This results in a heap out-of-bounds read and may cause application termination, leading to denial of service.

Record
DEBIAN-CVE-2026-88358
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-883586.5

simdjson 4.6.1 contains a one-byte out-of-bounds read vulnerability in dom::parser::parse_unpadded(). A specially crafted truncated JSON document whose final structural token closes a nested array or object can cause json_iterator::walk_document() to access buf[len] after the input buffer has been exhausted. This results in a heap out-of-bounds read and may cause application termination, leading to denial of service.

Record
UBUNTU-CVE-2026-88358
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02

Affected packages

Affected packages
PackageAffectedFixed
simdjson
Alpaquita:25
3.12.0-r0 up to 5.0.2-r0
5.0.2-r0
simdjson
Alpaquita:stream
3.6.0-r0 up to 5.0.1-r0
5.0.1-r0
simdjson
BellSoft Hardened Containers:25
3.12.0-r0 up to 5.0.2-r0
5.0.2-r0
simdjson
BellSoft Hardened Containers:stream
3.6.0-r0 up to 5.0.1-r0
5.0.1-r0
simdjson
Debian:13
All versions, plus listed versions
3.12.3-13.13.0-13.13.0-1.14.2.3-14.2.4-1
Show 15 moreShow less
4.3.1+really4.2.4-14.3.1+really4.3.1-14.3.1-14.3.1-24.3.1-44.3.1-54.5.0-14.6.0-14.6.11-14.6.3-14.6.4-14.6.5-14.6.6-14.6.7-14.6.8-1
None known
simdjson
Debian:14
All versions, plus listed versions
3.12.3-13.13.0-13.13.0-1.14.2.3-14.2.4-1
Show 15 moreShow less
4.3.1+really4.2.4-14.3.1+really4.3.1-14.3.1-14.3.1-24.3.1-44.3.1-54.5.0-14.6.0-14.6.11-14.6.3-14.6.4-14.6.5-14.6.6-14.6.7-14.6.8-1
None known
simdjson
Ubuntu:20.04:LTS
All versions, plus listed versions
0.2.1-10.2.1-1build1
None known
simdjson
Ubuntu:22.04:LTS
All versions, plus listed versions
0.7.1-11.0.2-2
None known
simdjson
Ubuntu:24.04:LTS
All versions, plus listed versions
3.2.1-13.2.3-13.6.3-13.6.4-1
None known
simdjson
Ubuntu:26.10
All versions, plus listed versions
4.2.4-14.6.4-14.6.4-1build14.6.4-1build24.6.6-14.6.7-14.6.8-1
None known
simdjson
Ubuntu:26.04:LTS
All versions, plus listed versions
3.12.3-13.13.0-1.14.2.4-1
None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2026-88358 is a medium vulnerability (CVSS 6.5) in simdjson, published September 24, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 34th percentile. Fixed in simdjson 5.0.2-r0.

References

Show 4 moreShow less
MoveEnter Open