Skip to content
Fencer Intel
medium 6.8

CVE-2010-1666 json

Improper Restriction of Operations within the Bounds of a Memory Buffer in python-cjson

published 16y ago modified 4mo ago also GHSA-cqmh-mpx2-g633 , PYSEC-2010-30 , EUVD-2010-0029

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 76%
public exploits
0
none known

Summary

Buffer overflow in Dan Pascu python-cjson 1.0.5, when UCS-4 encoding is enabled, allows context-dependent attackers to cause a denial of service (application crash) or possibly have unspecified other impact via vectors involving crafted Unicode input to the cjson.encode function.

Patch / fix

  • pypi python-cjson 1.0.5.1, 1.1.0

Is CVE-2010-1666 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Exploit prediction

1.67% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected packages

ecosystem package affected fixed in
pypi python-cjson
<1.0.5.1
<1.1.0
1.0.5.1
1.1.0

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.