Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | django-anymail | 1.3-1 | — |
| Debian 13 | django-anymail | 1.3-1 | — |
| Debian 12 | django-anymail | 1.3-1 | — |
| Debian 9 | django-anymail | 0.8-2+deb9u1 | DSA-4107-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | django-anymail | < 1.2.1 | 1.2.1 | GHSA-hxf9-7h4c-f5jv |
Advisories 1
- DSA-4107-1 django-anymail - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- DSA-4107 vendor-advisory
- https://github.com/anymail/django-anymail/commit/c07998304b4a31df4c61deddcb03d3607a04691b
- https://github.com/anymail/django-anymail/releases/tag/v1.3
- https://github.com/anymail/django-anymail/commit/db586ede1fbb41dce21310ea28ae15a1cf1286c5
- https://bugs.debian.org/889450
- https://github.com/anymail/django-anymail/releases/tag/v1.2.1