flask - Debian Package Tracker

general

source: flask (main)
version: 3.1.3-1
maintainer: Debian Python Team (DMD)
uploaders: Thomas Goirand [DMD]
arch: all
std-ver: 4.7.2
VCS: Git (Browse, QA)

versions [more versions can be listed by madison] [old versions available from snapshot.debian.org]

[pool directory]

o-o-stable: 1.1.2-2+deb11u1
o-o-sec: 1.1.2-2+deb11u1
oldstable: 2.2.2-3
stable: 3.1.1-1
testing: 3.1.2-1
unstable: 3.1.3-1

versioned links

1.1.2-2+deb11u1: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
2.2.2-3: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
3.1.1-1: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
3.1.2-1: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]
3.1.3-1: [.dsc, use dget on this link to retrieve source package] [changelog] [copyright] [rules] [control]

binaries

python-flask-doc
python3-flask (1 bugs: 0, 1, 0, 0)

action needed

1 security issue in forky high

There is 1 open security issue in forky.

1 important issue:

CVE-2026-27205: Flask is a web server gateway interface (WSGI) web application framework. In versions 3.1.2 and below, when the session object is accessed, Flask should set the Vary: Cookie header., resulting in a Use of Cache Containing Sensitive Information vulnerability. The logic instructs caches not to cache the response, as it may contain information specific to a logged in user. This is handled in most cases, but some forms of access such as the Python in operator were overlooked. The severity and risk depend on the application being hosted behind a caching proxy that doesn't ignore responses with cookies, not setting a Cache-Control header to mark pages as private or non-cacheable, and accessing the session in a way that only touches keys without reading values or mutating the session. The issue has been fixed in version 3.1.3.

Created: 2026-02-21 Last update: 2026-02-28 01:00

The package has not entered testing even though the delay is over normal

The package has not entered testing even though the 5-day delay is over. Check why.

Created: 2026-03-04 Last update: 2026-03-13 17:33

3 new commits since last upload, is it time to release? normal

vcswatch reports that this package seems to have new commits in its VCS but has not yet updated debian/changelog. You should consider updating the Debian changelog and uploading this new version into the archive.

Here are the relevant commit logs:

commit bbb53739ce5a888d6244a44143278df7e754538d
Author: Thomas Goirand <zigo@debian.org>
Date:   Fri Feb 27 10:02:52 2026 +0100

    Now packaging 3.1.3

commit 9a72fc28fc6290fda203abe521ee217ef3adfcc4
Merge: 9046579 ede0165
Author: Thomas Goirand <zigo@debian.org>
Date:   Fri Feb 27 10:02:24 2026 +0100

    Update upstream source from tag 'upstream/3.1.3'
    
    Update to upstream version '3.1.3'
    with Debian dir fbf5da06e39ecd1cf3ca04fe5c3c557a7cbe8242

commit ede0165addd16701940caed1b53544bb3bd03eb2
Author: Thomas Goirand <zigo@debian.org>
Date:   Fri Feb 27 10:02:22 2026 +0100

    New upstream version 3.1.3

Created: 2026-02-27 Last update: 2026-03-07 13:33

lintian reports 1 warning normal

Lintian reports 1 warning about this package. You should make the package lintian clean getting rid of them.

Created: 2026-03-01 Last update: 2026-03-01 00:00

1 low-priority security issue in trixie low

There is 1 open security issue in trixie.

1 issue left for the package maintainer to handle:

CVE-2026-27205: (needs triaging) Flask is a web server gateway interface (WSGI) web application framework. In versions 3.1.2 and below, when the session object is accessed, Flask should set the Vary: Cookie header., resulting in a Use of Cache Containing Sensitive Information vulnerability. The logic instructs caches not to cache the response, as it may contain information specific to a logged in user. This is handled in most cases, but some forms of access such as the Python in operator were overlooked. The severity and risk depend on the application being hosted behind a caching proxy that doesn't ignore responses with cookies, not setting a Cache-Control header to mark pages as private or non-cacheable, and accessing the session in a way that only touches keys without reading values or mutating the session. The issue has been fixed in version 3.1.3.

You can find information about how to handle this issue in the security team's documentation.

Created: 2026-02-21 Last update: 2026-02-28 01:00

1 low-priority security issue in bookworm low

There is 1 open security issue in bookworm.

1 issue left for the package maintainer to handle:

CVE-2026-27205: (needs triaging) Flask is a web server gateway interface (WSGI) web application framework. In versions 3.1.2 and below, when the session object is accessed, Flask should set the Vary: Cookie header., resulting in a Use of Cache Containing Sensitive Information vulnerability. The logic instructs caches not to cache the response, as it may contain information specific to a logged in user. This is handled in most cases, but some forms of access such as the Python in operator were overlooked. The severity and risk depend on the application being hosted behind a caching proxy that doesn't ignore responses with cookies, not setting a Cache-Control header to mark pages as private or non-cacheable, and accessing the session in a way that only touches keys without reading values or mutating the session. The issue has been fixed in version 3.1.3.

You can find information about how to handle this issue in the security team's documentation.

Created: 2026-02-21 Last update: 2026-02-28 01:00

debian/patches: 2 patches to forward upstream low

Among the 4 debian patches available in version 3.1.3-1 of the package, we noticed the following issues:

2 patches where the metadata indicates that the patch has not yet been forwarded upstream. You should either forward the patch upstream or update the metadata to document its real status.

Created: 2023-02-26 Last update: 2026-02-27 19:33

Standards version of the package is outdated. wishlist

The package should be updated to follow the last version of Debian Policy (Standards-Version 4.7.3 instead of 4.7.2).

Created: 2025-12-23 Last update: 2026-02-27 19:16

testing migrations

excuses:
- Migration status for flask (3.1.2-1 to 3.1.3-1): BLOCKED: Rejected/violates migration policy/introduces a regression
- Issues preventing migration:
- ∙ ∙ Autopkgtest for beets/2.5.1-4: ppc64el: Pass ♻, s390x: Pass ♻
- ∙ ∙ Autopkgtest for flask/3.1.3-1: amd64: Pass, arm64: Pass, i386: Pass, ppc64el: Pass, riscv64: Pass, s390x: Pass
- ∙ ∙ Autopkgtest for flask-socketio/5.6.0-1: amd64: Regression ♻ (reference ♻), arm64: Regression ♻ (reference ♻), i386: Regression ♻ (reference ♻), ppc64el: Regression ♻ (reference ♻), riscv64: Regression ♻ (reference ♻), s390x: Regression ♻ (reference ♻)
- Additional info (not blocking):
- ∙ ∙ Piuparts tested OK - https://piuparts.debian.org/sid/source/f/flask.html
- ∙ ∙ Reproduced on amd64
- ∙ ∙ Reproduced on arm64
- ∙ ∙ Reproduced on armhf
- ∙ ∙ Reproduced on i386
- ∙ ∙ Reproduced on ppc64el
- ∙ ∙ 14 days old (needed 5 days)
- Not considered

news

[rss feed]

[2026-02-27] Accepted flask 3.1.3-1 (source) into unstable (Thomas Goirand)
[2025-09-25] flask 3.1.2-1 MIGRATED to testing (Debian testing watch)
[2025-08-28] Accepted flask 3.1.2-1 (source) into unstable (Carsten Schoenert)
[2025-05-28] flask 3.1.1-1 MIGRATED to testing (Debian testing watch)
[2025-05-17] Accepted flask 3.1.1-1 (source) into unstable (Carsten Schoenert)
[2024-11-29] flask 3.1.0-2 MIGRATED to testing (Debian testing watch)
[2024-11-25] Accepted flask 3.1.0-2 (source) into unstable (Carsten Schoenert)
[2024-11-24] Accepted flask 3.1.0-1 (source) into experimental (Carsten Schoenert)
[2024-04-14] flask 3.0.3-1 MIGRATED to testing (Debian testing watch)
[2024-04-12] Accepted flask 3.0.3-1 (source) into unstable (Carsten Schoenert)
[2024-02-17] flask 3.0.2-1 MIGRATED to testing (Debian testing watch)
[2024-02-10] Accepted flask 3.0.2-1 (source) into unstable (Carsten Schoenert)
[2024-01-23] Accepted flask 3.0.1-1 (source) into experimental (Carsten Schoenert)
[2023-12-21] Accepted flask 3.0.0-1 (source) into experimental (Carsten Schoenert)
[2023-09-18] flask 2.2.5-1 MIGRATED to testing (Debian testing watch)
[2023-09-14] Accepted flask 2.2.5-1 (source) into unstable (Thomas Goirand)
[2023-08-20] Accepted flask 1.0.2-3+deb10u1 (source) into oldoldstable (Sean Whitton)
[2023-06-29] Accepted flask 1.1.2-2+deb11u1 (source) into oldstable-proposed-updates (Debian FTP Masters) (signed by: Moritz Mühlenhoff)
[2023-06-29] Accepted flask 1.1.2-2+deb11u1 (source) into oldstable-security (Debian FTP Masters) (signed by: Moritz Mühlenhoff)
[2023-05-18] flask 2.2.2-3 MIGRATED to testing (Debian testing watch)
[2023-05-11] Accepted flask 2.2.2-3 (source) into unstable (Thomas Goirand)
[2022-12-10] flask 2.2.2-2 MIGRATED to testing (Debian testing watch)
[2022-12-10] flask 2.2.2-2 MIGRATED to testing (Debian testing watch)
[2022-11-30] Accepted flask 2.2.2-2 (source) into unstable (Thomas Goirand)
[2022-09-18] Accepted flask 2.2.2-1 (source) into experimental (Thomas Goirand)
[2022-08-16] flask 2.0.3-1 MIGRATED to testing (Debian testing watch)
[2022-08-16] flask 2.0.3-1 MIGRATED to testing (Debian testing watch)
[2022-08-11] Accepted flask 2.0.3-1 (source) into unstable (Gabriela Pivetta) (signed by: Sergio Durigan Junior)
[2022-08-05] Accepted flask 2.0.1-4~bpo11+1 (source all) into bullseye-backports, bullseye-backports (Debian FTP Masters) (signed by: Joe Nahmias)
[2022-07-25] flask 2.0.1-4 MIGRATED to testing (Debian testing watch)

bugs [bug history graph]

all: 1
RC: 0
I&N: 1
M&W: 0
F&P: 0
patch: 0

links

homepage
lintian (0, 1)
buildd: logs, reproducibility
popcon
browse source code
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other distros
security tracker
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debci

ubuntu

[Information about Ubuntu for Debian Developers]

version: 3.1.3-1ubuntu1
patches for 3.1.3-1ubuntu1