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CVE-2026-26477

An issue in Dokuwiki v.2025-05-14b 'Librarian' allows a remote attacker to cause a denial of...

4.3 MediumFix available

An issue in Dokuwiki v.2025-05-14b "Librarian" [56.2] allows a remote attacker to cause a denial of service via the media_upload_xhr() function in the media.php file

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
Low

Exploit likelihood

0.46%Up 0.4 points since Apr 4, 2026
90%50%10%1%

What each source reports

CVE List Score used 4.3

An issue in Dokuwiki v.2025-05-14b "Librarian" [56.2] allows a remote attacker to cause a denial of service via the media_upload_xhr() function in the media.php file

Record
CVE-2026-26477
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-770, CWE-400
Updated
2026-11-02
EUVDEUVD-2026-18657 7.5

An issue in Dokuwiki v.2025-05-14b "Librarian" [56.2] allows a remote attacker to cause a denial of service via the media_upload_xhr() function in the media.php file

Record
EUVD-2026-18657
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-gwpq-c4hc-7qhj 7.5

An issue in Dokuwiki v.2025-05-14b 'Librarian' allows a remote attacker to cause a denial of...

An issue in Dokuwiki v.2025-05-14b 'Librarian' allows a remote attacker to cause a denial of service via the media_upload_xhr() function in the media.php file

Record
GHSA-gwpq-c4hc-7qhj
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400, CWE-770
Updated
2026-11-02
NVD 4.3

An issue in Dokuwiki v.2025-05-14b "Librarian" [56.2] allows a remote attacker to cause a denial of service via the media_upload_xhr() function in the media.php file

Record
CVE-2026-26477
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-770, CWE-400
Updated
2026-11-02
OSV 4.3

An issue in Dokuwiki v.2025-05-14b "Librarian" [56.2] allows a remote attacker to cause a denial of service via the media_upload_xhr() function in the media.php file

Record
CVE-2026-26477
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-770
Updated
2026-11-02
OSVDEBIAN-CVE-2026-26477 4.3

An issue in Dokuwiki v.2025-05-14b "Librarian" [56.2] allows a remote attacker to cause a denial of service via the media_upload_xhr() function in the media.php file

Record
DEBIAN-CVE-2026-26477
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Updated
2026-11-02
OSVUBUNTU-CVE-2026-26477 7.5

An issue in Dokuwiki v.2025-05-14b "Librarian" [56.2] allows a remote attacker to cause a denial of service via the media_upload_xhr() function in the media.php file

Record
UBUNTU-CVE-2026-26477
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
dokuwiki
Debian:12
 All versions, plus listed versions
0.0.20220731.a-20.0.20220731.a-32024-02-06b+dfsg-0exp12024-02-06b+dfsg-0exp22024-02-06b+dfsg-1
Show 29 moreShow less
2024-02-06b+dfsg-22024-02-06b+dfsg-32024-02-06b+dfsg-42024-02-06b+dfsg-52024-02-06b+dfsg-62024-02-06b+dfsg-72024-02-06b+dfsg-82024-02-06b+dfsg-92024-02-06b-0exp12024-02-06b-0exp22024-02-06b-0exp32024-02-06b-0exp42025-05-14+dfsg-12025-05-14.a+dfsg-12025-05-14.a+dfsg-22025-05-14.a+dfsg-32025-05-14.a+dfsg-42025-05-14.b+dfsg-12025-05-14.b+dfsg-22025-05-14.b+dfsg-32025-05-14.b+dfsg-42025-05-14.b+dfsg-52025-05-14.b+dfsg-62026-07-14+dfsg-12026-07-14.a+dfsg-12026-07-14.a+dfsg-22026-07-14.a+dfsg-32026-07-14.c+dfsg-12026-07-14a+dfsg-1
 None known
dokuwiki
Debian:13
 All versions, plus listed versions
2024-02-06b+dfsg-92025-05-14+dfsg-12025-05-14.a+dfsg-12025-05-14.a+dfsg-22025-05-14.a+dfsg-3
Show 13 moreShow less
2025-05-14.a+dfsg-42025-05-14.b+dfsg-12025-05-14.b+dfsg-22025-05-14.b+dfsg-32025-05-14.b+dfsg-42025-05-14.b+dfsg-52025-05-14.b+dfsg-62026-07-14+dfsg-12026-07-14.a+dfsg-12026-07-14.a+dfsg-22026-07-14.a+dfsg-32026-07-14.c+dfsg-12026-07-14a+dfsg-1
 None known
dokuwiki
Debian:14
 before 2025-05-14.b+dfsg-6, plus listed versions
2024-02-06b+dfsg-92025-05-14+dfsg-12025-05-14.a+dfsg-12025-05-14.a+dfsg-22025-05-14.a+dfsg-3
Show 6 moreShow less
2025-05-14.a+dfsg-42025-05-14.b+dfsg-12025-05-14.b+dfsg-22025-05-14.b+dfsg-32025-05-14.b+dfsg-42025-05-14.b+dfsg-5
2025-05-14.b+dfsg-6
dokuwiki
Ubuntu:16.04:LTS
 All versions, plus listed versions
0.0.20140929.d-10.0.20140929.d-1ubuntu1
 None known
dokuwiki
Ubuntu:18.04:LTS
 All versions, plus listed versions
0.0.20160626.a-2
 None known
dokuwiki
Ubuntu:20.04:LTS
 All versions, plus listed versions
0.0.20180422.a-2
 None known
dokuwiki
Ubuntu:22.04:LTS
 All versions, plus listed versions
0.0.20180422.a-2.1
 None known
dokuwiki
Ubuntu:24.04:LTS
 All versions, plus listed versions
0.0.20220731.a-2
 None known
dokuwiki
Ubuntu:25.10
 All versions, plus listed versions
2024-02-06b+dfsg-42024-02-06b+dfsg-9
 None known
dokuwiki
Ubuntu:26.10
 All versions, plus listed versions
2025-05-14.b+dfsg-52025-05-14.b+dfsg-62026-07-14.a+dfsg-2
 None known
dokuwiki
Ubuntu:26.04:LTS
 All versions, plus listed versions
2024-02-06b+dfsg-92025-05-14.a+dfsg-42025-05-14.b+dfsg-12025-05-14.b+dfsg-22025-05-14.b+dfsg-32025-05-14.b+dfsg-42025-05-14.b+dfsg-5
 None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2026-26477 is a medium vulnerability (CVSS 4.3) in Dokuwiki, published April 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.46%, the 40th percentile. Fixed in dokuwiki 2025-05-14.b+dfsg-6.

References

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