CVE catalog
CVE-2026-88358
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
- Severity
- Medium · CVSS 6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.39% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | simdjson | sid | 4.6.11-1 | not affected |
| Debian | simdjson | forky | 4.6.11-1 | not affected |
| Debian | simdjson | trixie | 3.12.3-1 | not affected |
| Debian | simdjson | bookworm | 3.0.1-1 | not affected |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | simdjson | source | sid | Not affected | unimportant | Not reported | Not reported |
| Debian | simdjson | source | forky | Not affected | unimportant | Not reported | Not reported |
| Debian | simdjson | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | simdjson | source | bookworm | Not affected | unimportant | Not reported | Not reported |
OpenFactory catalog packages
[Debian 13 (Trixie)]
- [libsimdjson25]Affected
Source package: [simdjson]
Details (2)
3.12.3-1· amd64 · trixieAffected
nvd · simdjson · debian · 13
3.12.3-1· arm64 · trixieAffected
nvd · simdjson · debian · 13
- [libsimdjson-dev]Affected
Source package: [simdjson]
Details (2)
3.12.3-1· amd64 · trixieAffected
nvd · simdjson · debian · 13
3.12.3-1· arm64 · trixieAffected
nvd · simdjson · debian · 13
[Debian 12 (Bookworm)]
- [libsimdjson14]Not affected
Source package: [simdjson]
Details (2)
3.0.1-1· amd64 · bookwormNot affected
nvd · simdjson · debian · bookworm
3.0.1-1· arm64 · bookwormNot affected
nvd · simdjson · debian · bookworm
- [libsimdjson-dev]Not affected
Source package: [simdjson]
Details (2)
3.0.1-1· amd64 · bookwormNot affected
nvd · simdjson · debian · bookworm
3.0.1-1· arm64 · bookwormNot affected
nvd · simdjson · debian · bookworm
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-88358]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-88358]
- [https://security-tracker.debian.org/tracker/CVE-2026-88358]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88358.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]