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Red Hat Security Advisory

RHSA-2026:56869

Red Hat JBoss Core Services Apache HTTP Server 2.4.62 SP5 security update

Released 2026-08-19 · Red Hat rating Important · View on Red Hat →

Fixed in

Fixes 32 records

TI-2026-10231 CVE-2026-11856 · GHSA-9crq-qh8v-6xmm

cross-origin Digest auth state leak

Priority HIGH 82

Successfully using libcurl to do a transfer to a specific HTTP origin (`hostA`) with **Digest** authentication and then changing the origin to a different one (`hostB`) for a second transfer, reusing the same handle, mak…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00688 Published 2026-07-03 Partial fix · 8.14.2, 8.16.1 +1 CWE-294
TI-2026-09063 CVE-2026-10536 · GHSA-wjq8-x4qm-6mmh

HTTP/2 stream-dependency tree UAF

Priority HIGH 82

A use-after-free vulnerability exists in libcurl when an application configures an HTTP/2 stream-dependency tree via `CURLOPT_STREAM_DEPENDS` or `CURLOPT_STREAM_DEPENDS_E`, subsequently invokes `curl_easy_reset()`, and f…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00598 Published 2026-07-03 Partial fix · 8.14.2, 8.16.1 +1 CWE-416
TI-2026-07976 CVE-2026-9079 · GHSA-f4cv-xm48-3694

stale proxy password leak

Priority HIGH 82

libcurl had a flaw that when instructed to clear proxy authentication credentials which made it not do so, leaving the old credentials around to get used for subsequent transfers that should not know nor use them.

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.01064 Published 2026-07-03 Partial fix · 8.14.2, 8.16.1 +1 CWE-522
TI-2026-07844 CVE-2026-8924 · GHSA-hm6c-rc5h-32m9

trailing dot domain super cookie

Priority HIGH 80

A flaw in curl’s cookie parsing logic allows a malicious HTTP server to set "super cookies" that bypass the Public Suffix List check.

CVSS 3.1CRITICAL 9.1 Network No auth No interaction EPSS 0.00661 Published 2026-07-03 Partial fix · 8.14.2, 8.16.1 +1 CWE-201
TI-2026-07847 CVE-2026-8927 · GHSA-jr4f-4564-w3mr

env-set cross-proxy Digest auth state leak

Priority HIGH 74

When reusing a libcurl handle for sequential transfers driven by environment-variable proxy configuration, libcurl fails to clear the proxy authentication state between requests.

CVSS 3.1CRITICAL 9.1 Network No auth No interaction EPSS 0.005 Published 2026-07-03 Partial fix · 8.14.2, 8.16.1 +1 CWE-294
TI-2026-10395 CVE-2026-12064 · GHSA-jm94-9f7h-36pr

proto-default skips SSH verification

Priority HIGH 72

When a user invokes curl using a schemeless URL combined with `--proto-default` sftp (or scp), a disconnect occurs between the tool layer and libcurl.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00414 Published 2026-07-03 Fixed in 8.14.2, 8.16.1 +1 CWE-297
TI-2026-08387 CVE-2026-9545 · GHSA-6v72-wfcj-jv53

exposing HTTP/3 early data

Priority HIGH 72

In this scenario, libcurl first uses a proper HTTP/3 server for the initial transfers, and when it makes a second transfer to the same site it has been replaced by the attacker's impostor machine - without a valid certif…

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00408 Published 2026-07-03 Partial fix · 8.14.2, 8.16.1 +1 CWE-200
Priority HIGH 72

libcurl would reuse a previously created connection even when some mTLS config related option had been changed that should have prohibited reuse.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00396 Published 2026-07-03 Partial fix · 8.14.2, 8.16.1 +1 CWE-305
TI-2026-07301 CVE-2026-8286 · GHSA-32xh-3x3c-6g6h

wrong STARTTLS connection reuse

Priority HIGH 70

A vulnerability exists where a new transfer that uses STARTTLS to upgrade the connection might reuse an existing live connection even though the TLS configuration mismatches so it should not.

CVSS 3.1HIGH 8.1 Network Low privileges No interaction EPSS 0.00309 Published 2026-07-03 Partial fix · 8.14.2, 8.16.1 +1 CWE-295
TI-2026-08389 CVE-2026-9547 · GHSA-xq9p-gxg6-f7q6

SSH improper host validation

Priority HIGH 68

When a libcurl-based application performs transfers via `SCP://` or `SFTP://` and utilizes the `CURLOPT_SSH_KEYFUNCTION` callback, it may silently accept an untrusted server.

CVSS 3.1HIGH 7.4 Network No auth No interaction EPSS 0.00361 Published 2026-07-03 Partial fix · 8.14.2, 8.16.1 +1 CWE-297
TI-2026-06291 CVE-2026-7168 · GHSA-v92m-hrhj-gw54

cross-proxy Digest auth state leak

Priority MEDIUM 63

Successfully using libcurl to do a transfer over a specific HTTP proxy (`proxyA`) with **Digest** authentication and then changing the proxy host to a second one (`proxyB`) for a second transfer, reusing the same handle,…

CVSS 3.1MEDIUM 5.3 Network No auth No interaction EPSS 0.00471 Published 2026-05-13 Partial fix · 8.14.2, 8.16.1 +1 CWE-294
TI-2026-03272 CVE-2026-3783 · GHSA-8whr-249c-vfjp

token leak with redirect and netrc

Priority MEDIUM 63

When an OAuth2 bearer token is used for an HTTP(S) transfer, and that transfer performs a redirect to a second URL, curl could leak that token to the second hostname under some circumstances.

CVSS 3.1MEDIUM 5.3 Network No auth No interaction EPSS 0.00495 Published 2026-03-11 Partial fix · 8.14.2, 8.16.1 +1 CWE-522
TI-2026-07430 CVE-2026-8458 · GHSA-88c6-6jfq-mm4q

wrong reuse for different services

Priority MEDIUM 62

libcurl might in some circumstances reuse the wrong connection when asked to do Negotiate-authenticated ones, even when they are set to use different "services".

CVSS 3.1MEDIUM 6.5 Network Low privileges No interaction EPSS 0.00371 Published 2026-07-03 Partial fix · 8.14.2, 8.16.1 +1 CWE-488
Priority MEDIUM 60

curl might erroneously pass on credentials for a first proxy to a second proxy.

CVSS 3.1MEDIUM 5.9 Network No auth No interaction EPSS 0.00719 Published 2026-05-13 Partial fix · 8.14.2, 8.16.1 +1 CWE-522
Priority MEDIUM 50

Use After Free vulnerability in Apache HTTP Server with mod_ldap in per-directory configuration This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00688 Published 2026-06-08 Partial fix CWE-416
Priority MEDIUM 48

A path handling issue in mod_dav_fs in Apache 2.4.67 and earlier allows a WebDAV content author to directly manipulate trusted DAV property databases, potentially causing child process crashes.

CVSS 3.1CRITICAL 9.1 Network No auth No interaction EPSS 0.00538 Published 2026-06-08 Partial fix CWE-668
Priority MEDIUM 41

Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and untrusted content This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.01024 Published 2026-06-08 Partial fix CWE-122
Priority MEDIUM 41

A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an untrusted backend.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.01161 Published 2026-06-08 Partial fix CWE-122
Priority MEDIUM 41

An escalation of privilege bug in various modules in Apache HTTP 2.4.66 and earlier allows local .htaccess authors to read files with the privileges of the httpd user.

CVSS 3.1HIGH 8.8 Network Low privileges No interaction EPSS 0.00654 Published 2026-05-04 Partial fix CWE-269
Priority MEDIUM 40

Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and ProxyPassReverseCookie* This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00708 Published 2026-06-08 Fixed CWE-122
TI-2024-28481 CVE-2024-42516 · GHSA-5j7h-7m92-jgh4

Apache HTTP Server: HTTP response splitting

Priority MEDIUM 40

HTTP response splitting in the core of Apache HTTP Server allows an attacker who can manipulate the Content-Type response headers of applications hosted or proxied by the server can split the HTTP response.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00818 Published 2025-07-10 Partial fix CWE-20
Priority LOW 39

Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in the mod_proxy_ftp module in Apache HTTP Server with an attacker controlled backend FTP server.

CVSS 3.1HIGH 7.3 Network No auth No interaction EPSS 0.00583 Published 2026-06-08 Partial fix CWE-835
Priority LOW 39

Buffer Over-read vulnerability in Apache HTTP Server via outbound OCSP requests to an attacker controlled OCSP server This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

CVSS 3.1HIGH 7.3 Network No auth No interaction EPSS 0.00741 Published 2026-06-08 Partial fix CWE-126
Priority LOW 35

curl would wrongly reuse an existing HTTP proxy connection doing CONNECT to a server, even if the new request uses different credentials for the HTTP proxy.

CVSS 3.1MEDIUM 6.5 Network No auth No interaction EPSS 0.00448 Published 2026-03-11 Partial fix · 8.14.2, 8.16.1 +1 CWE-305
TI-2026-04856 CVE-2026-5545 · GHSA-6g7g-56fm-f8mp

wrong reuse of HTTP Negotiate connection

Priority LOW 29

libcurl might in some circumstances reuse the wrong connection when asked to do an authenticated HTTP(S) request after a Negotiate-authenticated one, when both use the same host.

CVSS 3.1MEDIUM 6.5 Network No auth No interaction EPSS 0.00414 Published 2026-05-13 Partial fix · 8.14.2, 8.16.1 +1 CWE-305
TI-2026-01624 CVE-2026-1965 · GHSA-q9qg-g2c3-3hr2

bad reuse of HTTP Negotiate connection

Priority LOW 29

libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request.

CVSS 3.1MEDIUM 6.5 Network Low privileges No interaction EPSS 0.00297 Published 2026-03-11 Partial fix · 8.14.2, 8.16.1 +1 CWE-305
TI-2026-23288 CVE-2026-29170 · GHSA-9rm4-vpqg-mfpc

Apache HTTP Server: mod_proxy_ftp XSS

Priority LOW 28

A cross-site scripting vulnerability exists in mod_proxy_ftp's HTML directory list generation in Apache HTTP Server 2.4.67 and earlier when listing FTP directory contents either via forward or reverse proxy configuration…

CVSS 3.1MEDIUM 6.1 Network No auth User interaction EPSS 0.00481 Published 2026-06-08 Partial fix CWE-79