CVE-2011-1156 json
feedparser denial of service vulnerability
published 2011-04-11 15 y ago modified 2026-06-16 4 mo ago also GHSA-6h52-4vmh-8x4f , PYSEC-2011-19 , EUVD-2011-0014
- cvss
- 7.5
- version 3.1, GitHub
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.3%
- EPSS 3.3% chance of exploitation in 30 days, percentile 88%
- public exploits
- 0
- none known
Summary
feedparser.py in Universal Feed Parser (aka feedparser or python-feedparser) before 5.0.1 allows remote attackers to cause a denial of service (application crash) via a malformed DOCTYPE declaration.
Patch / fix
- pypi feedparser 5.0.1
- feedparser Debian 14, Debian 13, Debian 12 5.0.1-1
debian advisories DEBIAN-CVE-2011-1156
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2011-1156 updated cvss 4.3
python-feedparser: multiple flaws corrected in version 5.0.1
-
Red Hat All currently supported Red Hat productsnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
3.26% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- code.google.com https://code.google.com/p/feedparser/issues/detail?id=91 referenced PoC, tagged "exploit" by a source, unverified
- openwall.com http://openwall.com/lists/oss-security/2011/03/15/11 referenced PoC, tagged "exploit" by a source, unverified
- bugzilla.novell.com https://bugzilla.novell.com/show_bug.cgi?id=680074 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | feedparser | >=4.1, <5.0.1 <5.0.1 |
5.0.1 |
Classification
References
-
openwall.com
/lists/oss-security/2011/03/14/18
mailing-list, web, patch
-
code.google.com
/p/feedparser/issues/detail?id=91
web, exploit, patch
-
openwall.com
/lists/oss-security/2011/03/15/11
mailing-list, web, exploit, patch
-
bugzilla.novell.com
/show_bug.cgi?id=680074
web, exploit, patch, report
-
mandriva.com
/security/advisories?name=MDVSA-2011:082
vendor-advisory, advisory
-
secunia.com
/advisories/43730
third-party-advisory, vendor-advisory, advisory
-
secunia.com
/advisories/44074
third-party-advisory, vendor-advisory, advisory
-
support.novell.com
/security/cve/CVE-2011-1156.html
web
-
securityfocus.com
/bid/46867
vdb-entry, web
-
bugzilla.redhat.com
/show_bug.cgi?id=684877
web, report
-
lists.opensuse.org
/opensuse-updates/2011-04/msg00026.html
mailing-list, web
-
nvd.nist.gov
/vuln/detail/CVE-2011-1156
advisory
-
github.com
/advisories/GHSA-6h52-4vmh-8x4f
advisory
-
github.com
/pypa/advisory-database/tree/main/vulns/feedparser/PYSEC-2011-19.yaml
web
-
web.archive.org
/web/20150523054015/http://www.mandriva.com/en/support/security/advisories/advisory/MDVSA-2011:082/?name=MDVSA
web
-
web.archive.org
/web/20210121212051/https://www.securityfocus.com/bid/46867
web
Sources
- CVE List CVE-2011-1156
- GitHub Advisory GHSA-6h52-4vmh-8x4f
- NVD CVE-2011-1156
- OSV PYSEC-2011-19
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.