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3192 articles · 168085 vulns · 37/41 feeds (7d)
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7.1
CVE-2026-49839EXPLOITEDPATCHED
jqlang · jq

jq --rawfile invalid-state reuse after String too long causes heap-buffer-overflow

Description

A remote, anonymous attacker can exploit a vulnerability in jq to perform a Denial of Service attack.

Affected Products

VendorProductVersions
jqlangjq< 1.8.2

Also Affects

Downstream vendors/products affected by this vulnerability

VendorProductSourceConfidence
open sourcejqcert_advisory90%

References

  • https://github.com/jqlang/jq/security/advisories/GHSA-cfh2-vwfq-qfmm(x_refsource_CONFIRM)

Related News (2 articles)

Tier B
BSI Advisories1d ago
[NEU] [mittel] jq: Schwachstelle ermöglicht Denial of Service
→ No new info (linked only)
Tier C
VulDB2d ago
CVE-2026-49839 | jqlang jq up to 1.8.1 jv_string_append_buf out-of-bounds write
→ No new info (linked only)
CVSS 3.17.1 HIGH
VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
CISA KEV❌ No
Actively exploited✅ Yes
Patch available
1.8.2
CWECWE-787
PublishedJun 25, 2026
Last enriched1d agov3
Tags
Denial of Service
Trending Score57
Source articles2
Independent2
Info Completeness10/14
Missing: epss, kev, iocs, mitre_attack

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Related CVEs (5)

HIGHCVE-2026-39979EXP
jq: Out-of-Bounds Read in jv_parse_sized() Error Formatting for Non-NUL-Terminated Counted Buffers
Trending: 61
NONECVE-2026-47770
jq: stack overflow in deep structural equality
Trending: 13
NONECVE-2026-54679
jq: potential integer overflow in jvp_string_append
Trending: 13
HIGHCVE-2026-44777
jq: stack overflow in module loading on mutual `include`
Trending: 3
MEDIUMCVE-2026-43894
jq: Wild stack write via signed-integer overflow in decNumber D2U() macro

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Verification

State: unverified
Confidence: 0%

Vulnerability Timeline

CVE Published
Jun 25, 2026
Discovered by ZDM
Jun 25, 2026
Updated: severity, patchAvailable
Jun 25, 2026
Actively Exploited
Jun 25, 2026
Exploit Available
Jun 25, 2026
Patch Available
Jun 25, 2026
Updated: description, exploitAvailable, activelyExploited, tags
Jun 26, 2026

Version History

v3
Last enriched 1d ago
v3Tier B1d ago

Updated description to include Denial of Service attack and marked exploit as available and actively exploited.

descriptionexploitAvailableactivelyExploitedtags
via BSI Advisories
v2Tier C2d ago

Updated severity to CRITICAL, noted that no exploit exists, and specified the fixed version as 1.8.2.

severitypatchAvailable
via VulDB
v12d ago

Initial creation