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CVE-2018-6596

Django-Anymail prone to a timing attack

9.1 CriticalFix available

webhooks/base.py in Anymail (aka django-anymail) before 1.2.1 is prone to a timing attack vulnerability on the WEBHOOK_AUTHORIZATION secret, which allows remote attackers to post arbitrary e-mail tracking events.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
None

Exploit likelihood

2.61%Up 0.7 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.1

webhooks/base.py in Anymail (aka django-anymail) before 1.2.1 is prone to a timing attack vulnerability on the WEBHOOK_AUTHORIZATION secret, which allows remote attackers to post arbitrary e-mail tracking events.

Record
CVE-2018-6596
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 2.0
6.4 MediumAV:N/AC:L/Au:N/C:P/I:P/A:N
Weakness
CWE-200
Updated
2026-11-02
CVE List No score

webhooks/base.py in Anymail (aka django-anymail) before 1.2.1 is prone to a timing attack vulnerability on the WEBHOOK_AUTHORIZATION secret, which allows remote attackers to post arbitrary e-mail tracking events.

Record
CVE-2018-6596
Updated
2026-11-02
EUVDEUVD-2018-0034 No score

webhooks/base.py in Anymail (aka django-anymail) before 1.2.1 is prone to a timing attack vulnerability on the WEBHOOK_AUTHORIZATION secret, which allows remote attackers to post arbitrary e-mail tracking events.

Record
EUVD-2018-0034
Updated
2026-11-03
GitHub AdvisoriesGHSA-hxf9-7h4c-f5jv 9.3

Django-Anymail prone to a timing attack

webhooks/base.py in Anymail (aka django-anymail) before 1.2.1 is prone to a timing attack vulnerability on the WEBHOOK_AUTHORIZATION secret, which allows remote attackers to post arbitrary e-mail tracking events.

Record
GHSA-hxf9-7h4c-f5jv
CVSS 4.0
9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness
CWE-200
Updated
2026-11-02
OSV 9.1

webhooks/base.py in Anymail (aka django-anymail) before 1.2.1 is prone to a timing attack vulnerability on the WEBHOOK_AUTHORIZATION secret, which allows remote attackers to post arbitrary e-mail tracking events.

Record
CVE-2018-6596
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2018-6596 9.1

webhooks/base.py in Anymail (aka django-anymail) before 1.2.1 is prone to a timing attack vulnerability on the WEBHOOK_AUTHORIZATION secret, which allows remote attackers to post arbitrary e-mail tracking events.

Record
DEBIAN-CVE-2018-6596
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated
2026-11-02
OSVGHSA-hxf9-7h4c-f5jv 9.3

Django-Anymail prone to a timing attack

webhooks/base.py in Anymail (aka django-anymail) before 1.2.1 is prone to a timing attack vulnerability on the WEBHOOK_AUTHORIZATION secret, which allows remote attackers to post arbitrary e-mail tracking events.

Record
GHSA-hxf9-7h4c-f5jv
CVSS 4.0
9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness
CWE-200
Updated
2026-11-02
OSVUBUNTU-CVE-2018-6596 9.1

webhooks/base.py in Anymail (aka django-anymail) before 1.2.1 is prone to a timing attack vulnerability on the WEBHOOK_AUTHORIZATION secret, which allows remote attackers to post arbitrary e-mail tracking events.

Record
UBUNTU-CVE-2018-6596
CVSS 3.0
9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated
2026-11-02
OSVPYSEC-2018-7 No score

webhooks/base.py in Anymail (aka django-anymail) before 1.2.1 is prone to a timing attack vulnerability on the WEBHOOK_AUTHORIZATION secret, which allows remote attackers to post arbitrary e-mail tracking events.

Record
PYSEC-2018-7
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
django-anymail
PyPI
 before 1.2.1
1.2.1
django-anymail
Debian:12
 before 1.3-1
1.3-1
django-anymail
Debian:13
 before 1.3-1
1.3-1
django-anymail
Debian:14
 before 1.3-1
1.3-1
django-anymail
Debian:9
 before 0.8-2+deb9u1, plus listed versions
0.6.1-10.7-10.8-10.8-2
0.8-2+deb9u1
django-anymail
PyPI
 before 1.2.1, plus listed versions
0.10.1.dev00.1.dev10.1.dev20.10
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0.110.11.10.20.30.3.10.4.10.4.20.50.60.6.10.70.80.91.01.0rc01.11.2
1.2.1

History

History
RecordedChangedSources
affected
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-6596 is a critical vulnerability (CVSS 9.1) in Django-anymail Project Django-anymail, published February 3, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.61%, the 85th percentile. Fixed in django-anymail 1.2.1.

References

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