November 14, 2026

CVE Watchtower

CVE-2026-124586Tencent RapidJSON Out-of-bounds Read

NVD

Vulnerability Summary

A vulnerability was determined in Tencent RapidJSON 1.1.0. Impacted is the function GetCachedPowerByIndex in the library include/rapidjson/internal/diyfp.h. This manipulation of the argument decimalPosition causes out-of-bounds read. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.
Severity Level
MEDIUM(6.9)
Published Date
Nov 9, 2026
Last Modified
Nov 10, 2026
Exploitation Status
Public exploit available
EPSS Score (30-Day)
0.39%Probability
Root Weakness (CWE)
CWE-125: Out-of-bounds Read β†—
The software reads data past the end, or before the beginning, of the intended buffer.
CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer β†—
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the intended boundary of the buffer.
CVSS v4.0 Base Metrics — Score 6.9 (MEDIUM)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsNone
Privileges RequiredNone
User InteractionNone
Confidentiality (Vulnerable System)Low
Integrity (Vulnerable System)Low
Availability (Vulnerable System)Low
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)None
Show CVSS v3.x metrics (score 7.3)
CVSS v3.1 Base Metrics — Score 7.3 (HIGH)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityLow
AvailabilityLow

Affected & Patched Versions

Affected Versions
  • Tencent RapidJSON 1.1.0
Patched Versions
No patched version published yet
Until a fix ships, reduce exposure:
  • Restrict access to the affected service or interface to trusted networks.
  • Disable the affected feature if you do not need it.
  • Watch the vendor advisory for a firmware or software update.

What to do

Prioritize this fix. Exploit code is public, so attacks can follow quickly.

  1. Check whether you run Tencent RapidJSON and which version.
  2. No patched version is listed yet. Limit access to the affected service to trusted networks, and disable the feature if you can.
  3. Subscribe to the vendor advisory so you learn when a fix ships.
  4. Review logs and exposed services for signs of earlier compromise.

Timeline

  • Nov 9, 2026Published
  • Nov 10, 2026Record last modified

Score, severity and exploitation changes are tracked from the day Watchtower started logging them.

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External References

Data last checked: Nov 14, 2026 01:09 UTC