CVE-2025-3891

highpriority · track · 1EPSS 0.016 · 75 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.58% (75th) EPSS

CVSS 7.5 · high

Is it mine?

70 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-27

A flaw was found in the mod_auth_openidc module for Apache httpd. This flaw allows a remote, unauthenticated attacker to trigger a denial of service by sending an empty POST request when the OIDCPreservePost directive is enabled. The server crashes consistently, affecting availability.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · secalert@redhat.com USexploitability 3.9 · impact 3.6

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-248USCWE-248US

affected products (70)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat Enterprise Linux mod_auth_openidcall versionscert_bundDEcpe:/o:redhat:enterprise_linux:mod_auth_openidc
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
Red Hat Red Hat Enterprise Linux 8< 8100020250426100353.489197e6enisa_euvdEU
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support< 8020020250612174445.4cda2c84enisa_euvdEU
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support< 8040020250618101351.522a0ee4enisa_euvdEU
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support< 8060020250617090503.ad008a3aenisa_euvdEU
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service< 8060020250617090503.ad008a3aenisa_euvdEU
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions< 8060020250617090503.ad008a3aenisa_euvdEU
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service< 8080020250617090716.63b34585enisa_euvdEU
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions< 8080020250617090716.63b34585enisa_euvdEU
Red Hat Red Hat Enterprise Linux 9< 0:2.4.10-1.el9_6.2enisa_euvdEU
Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions< 0:2.4.9.4-1.el9_0.3enisa_euvdEU
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions< 0:2.4.9.4-1.el9_2.3enisa_euvdEU
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support< 0:2.4.9.4-4.el9_4.2enisa_euvdEU
Novell Inc. OpenSUSE Leap≤ 15.6fstec_bduRU
Novell Inc. SUSE Enterprise Storage≤ 7.1fstec_bduRU
Novell Inc. SUSE Liberty Linux≤ 8fstec_bduRU

showing 20 of 70

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-0956Red Hat Enterprise Linux (mod_auth_openidc): Schwachstelle ermöglicht Denial of ServiceDeutsch2025-05-06csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux ausnutzen, um einen Denial of Service Angriff durchzuführen.
BIT-apache-2025-38912025-05-13vendor · osvUS
A flaw was found in the mod_auth_openidc module for Apache httpd. This flaw allows a remote, unauthenticated attacker to trigger a denial of service by sending an empty POST request when the OIDCPreservePost directive is enabled. The server crashes consistently, affecting availability.

also known as (13)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv cert_bund NVD CVE.org MITRE

published 2025-04-29modified 2026-06-29

references (30)

External citations — patches, advisories, analysis.

scry

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