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CVE-2012-1150

21
FAUCET Score

CVE-2012-1150 is a denial-of-service vulnerability affecting Python versions prior to 2.6.8, 2.7.3, 3.1.5, and 3.2.3. Attackers can exploit this by providing crafted input that triggers predictable hash collisions, leading to high CPU consumption in applications using hash tables. This vulnerability has a CVSS score of 5.0, indicating a medium severity, and can be exploited remotely with low attack complexity, resulting in a denial of service. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.6.7CPE matchmatch criteria
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
0.9.0CPE matchmatch criteria
cpe:2.3:a:python:python:0.9.0:*:*:*:*:*:*:*
0.9.1CPE matchmatch criteria
cpe:2.3:a:python:python:0.9.1:*:*:*:*:*:*:*
1.2CPE matchmatch criteria
cpe:2.3:a:python:python:1.2:*:*:*:*:*:*:*
1.3CPE matchmatch criteria
cpe:2.3:a:python:python:1.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
5.06%
Probability of exploitation in next 30 days
EPSS Percentile
91.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0506 is in the 88th percentile among its peer group of 23,723 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: python-0:2.4.3-46.el5_8.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: python-0:2.6.6-29.el6_2.2
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: python

Vendor Advisories (1)

redhatCVE-2012-1150Moderate

python: hash table collisions CPU usage DoS (oCERT-2011-003)

Dec 28, 2011

References

bugs.python.org / issue13703
Exploit
lists.apple.com / archives/security-announce/2013/Oct/msg00004.html
lists.opensuse.org / opensuse-security-announce/2020-01/msg00040.html
mail.python.org / pipermail/python-dev/2011-December/115116.html
mail.python.org / pipermail/python-dev/2012-January/115892.html
python.org / download/releases/2.6.8
PatchVendor Advisory
python.org / download/releases/2.7.3
PatchVendor Advisory
python.org / download/releases/3.1.5
PatchVendor Advisory
python.org / download/releases/3.2.3
PatchVendor Advisory
bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/50858
secunia.com / advisories/51087
secunia.com / advisories/51089
openwall.com / lists/oss-security/2012/03/10/3
ubuntu.com / usn/USN-1592-1
ubuntu.com / usn/USN-1596-1
ubuntu.com / usn/USN-1615-1
ubuntu.com / usn/USN-1616-1