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CVE-2016-9964

bottle.py vulnerable to CRLF Injection

6.5 MediumFix available

CVE-2016-9964 is a medium vulnerability (CVSS 6.5) in Bottlepy Bottle, published December 16, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.76%, the 78th percentile. Fixed in bottle 0.12.11.

redirect() in bottle.py in bottle 0.12.10 doesn't filter a "\r\n" sequence, which leads to a CRLF attack, as demonstrated by a redirect("233\r\nSet-Cookie: name=salt") call.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
None

Exploit likelihood

1.76%Up 0.7 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 6.5

redirect() in bottle.py in bottle 0.12.10 doesn't filter a "\r\n" sequence, which leads to a CRLF attack, as demonstrated by a redirect("233\r\nSet-Cookie: name=salt") call.

Record
CVE-2016-9964
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness
CWE-93
Updated
2026-11-02
CVE List No score

redirect() in bottle.py in bottle 0.12.10 doesn't filter a "\r\n" sequence, which leads to a CRLF attack, as demonstrated by a redirect("233\r\nSet-Cookie: name=salt") call.

Record
CVE-2016-9964
Updated
2026-11-02
EUVDEUVD-2016-0002 No score

redirect() in bottle.py in bottle 0.12.10 doesn't filter a "\r\n" sequence, which leads to a CRLF attack, as demonstrated by a redirect("233\r\nSet-Cookie: name=salt") call.

Record
EUVD-2016-0002
Updated
2026-11-03
GitHub AdvisoriesGHSA-j6f7-hghw-g437 7.1

bottle.py vulnerable to CRLF Injection

bottle.py is a fast and simple micro-framework for python web-applications. redirect() in bottle.py in bottle 0.12.10 doesn't filter a "\r\n" sequence, which leads to a CRLF attack, as demonstrated by a redirect("233\r\nSet-Cookie: name=salt") call.

Record
GHSA-j6f7-hghw-g437
CVSS 4.0
7.1 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Weakness
CWE-93
Updated
2026-11-02
OSV 6.5

redirect() in bottle.py in bottle 0.12.10 doesn't filter a "\r\n" sequence, which leads to a CRLF attack, as demonstrated by a redirect("233\r\nSet-Cookie: name=salt") call.

Record
CVE-2016-9964
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2016-9964 6.5

redirect() in bottle.py in bottle 0.12.10 doesn't filter a "\r\n" sequence, which leads to a CRLF attack, as demonstrated by a redirect("233\r\nSet-Cookie: name=salt") call.

Record
DEBIAN-CVE-2016-9964
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Updated
2026-11-02
Show 5 moreShow less
OSVGHSA-j6f7-hghw-g437 7.1

bottle.py vulnerable to CRLF Injection

bottle.py is a fast and simple micro-framework for python web-applications. redirect() in bottle.py in bottle 0.12.10 doesn't filter a "\r\n" sequence, which leads to a CRLF attack, as demonstrated by a redirect("233\r\nSet-Cookie: name=salt") call.

Record
GHSA-j6f7-hghw-g437
CVSS 4.0
7.1 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Weakness
CWE-93
Updated
2026-11-02
OSVUBUNTU-CVE-2016-9964 6.5

redirect() in bottle.py in bottle 0.12.10 doesn't filter a "\r\n" sequence, which leads to a CRLF attack, as demonstrated by a redirect("233\r\nSet-Cookie: name=salt") call.

Record
UBUNTU-CVE-2016-9964
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Updated
2026-11-02
OSVMGASA-2017-0031 No score

Updated python-bottle packages fix security vulnerability

redirect() in bottle.py in bottle 0.12.10 doesn't filter a "\r\n" sequence, which leads to a CRLF attack, as demonstrated by a redirect("233\r\nSet-Cookie: name=salt") call. (CVE-2016-9964)

Record
MGASA-2017-0031
Updated
2026-11-02
OSVopenSUSE-SU-2024:11220-1 No score

python-bottle-doc-0.12.19-1.8 on GA media

These are all security issues fixed in the python-bottle-doc-0.12.19-1.8 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11220-1
Updated
2026-11-02
OSVPYSEC-2016-24 No score

redirect() in bottle.py in bottle 0.12.10 doesn't filter a "\r\n" sequence, which leads to a CRLF attack, as demonstrated by a redirect("233\r\nSet-Cookie: name=salt") call.

Record
PYSEC-2016-24
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
bottle
PyPI
 0.10.1 up to 0.12.11
0.12.11
python-bottle
Debian:12
 before 0.12.11-1
0.12.11-1
python-bottle
Debian:13
 before 0.12.11-1
0.12.11-1
python-bottle
Debian:14
 before 0.12.11-1
0.12.11-1
python-bottle
Debian:7
 before 0.10.11-1+deb7u2, plus listed versions
0.10.11-10.10.11-1+deb7u1
0.10.11-1+deb7u2
python-bottle
Debian:8
 before 0.12.7-1+deb8u1, plus listed versions
0.12.7-1
0.12.7-1+deb8u1
bottle
PyPI
 0.10.1 up to 0.12.11, plus listed versions
0.10.100.10.110.10.120.10.20.10.3
Show 23 moreShow less
0.10.40.10.50.10.60.10.70.10.80.10.90.11.10.11.20.11.30.11.40.11.50.11.60.11.70.12.10.12.100.12.20.12.30.12.40.12.50.12.60.12.70.12.80.12.9
0.12.11
python-bottle
Mageia:5
 before 0.12.11-1.mga5
0.12.11-1.mga5
python-bottle
Ubuntu:Pro:14.04:LTS
 before 0.12.0-1ubuntu0.1~esm1, plus listed versions
0.11.6-10.12.0-1
0.12.0-1ubuntu0.1~esm1
python-bottle
Ubuntu:16.04:LTS
 before 0.12.7-1+deb8u1build0.16.04.1, plus listed versions
0.12.7-1
0.12.7-1+deb8u1build0.16.04.1

History

History
WhenChangedSources
2026-11-03aliasesEUVD
2026-11-02createdCVE List, GitHub Advisories, NVD, OSV

References

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