CURLOPT_GSSAPI_DELEGATION exposes distinct modes:
CURLGSSAPI_DELEGATION_POLICY_FLAG is documented as delegating only when
OK-AS-DELEGATE policy permits it, while CURLGSSAPI_DELEGATION_FLAG is
unconditional. The new SSPI implementation checks for either bit and
sets ISC_REQ_DELEGATE, so a caller requesting policy-limited delegation
is put on the same SSPI path as unconditional delegation.
In addition, curl's existing protection that avoids reusing a connection
when the GSS delegation setting differs was guarded only by HAVE_GSSAPI;
SSPI-only builds now have an effective delegation option, but the
connection's delegation setting was neither copied nor compared. This
would cause Windows SSPI Negotiate/Kerberos authentication to delegate
credentials contrary to the caller's selected policy or reuse an
already-delegated authenticated connection for a transfer that requested
no delegation.
Follow-up to cc6777d939
Reported by Codex Security
Closes#21583
The SASL service name, used in authentication, is part of curl's credentials
when authenticating to a server/proxy. Make it part of `struct Curl_creds`.
Change code to use `creds` to obtain a service name. By tying creds used
to the connection, connection reuse is also only allowed when the service
name matches.
Closes#21585
As this function can now be invoked with only the second glob "active",
it must avoid accessing the first one if not in use.
Follow-up to 2238f0921c
Spotted by Codex Security
Closes#21586
Use parts of text from the upload filename field when that uses globbing
by giving it a name the same way we do it for URL globs. For example, if
you upload three files to a HTTP URL and want to save the corresponding
responses in separate files:
curl -T 'file{<num>1,2,3}' https://upload.example/ -o 'response-#<num>'
Verified by test 2014
Closes#21407
As a follow-up to commits ca7ef4b817 ("BUG-BOUNTY.md: we stop the
bug-bounty end of Jan 2026", 2026-01-22) and ed7bf43a08 ("BUG-BOUNTY.md:
minor rephrase to say there is no bug bounty", 2026-03-10), remove a
leftover mention of the reward for vulnerability reports, that no longer
exists, in file `VULN-DISCLOSURE-POLICY.md`.
Fixes#21571
Reported-by: Alan De Smet
Closes#21574
This now points to where the duplicate name ends, not where it starts.
Also fixes test 2410 to use a fixed hostname so that the error position
remains the same.
Reported-by: Viktor Szakats
Fixes#21567Closes#21568
Authorizdation credentials are kept in `struct Curl_creds`. This contains:
* `user`: the username, maybe the empty string
* `passwd`: the password, maybe the empty string
* `sasl_authzid`: the SASL authz value, maybe the empty string
* `oauth_bearer`: the OAUTH bearer token, maybe the empty string
* `source`: where the credentials from from
* `refcount`: a reference counter to link/unkink creds
A `creds` with all values empty is equivalent to NULL, e.g. no `creds`
instance. With reference counting, `creds` can be linked/unlinked
in several places.
See docs/internals/CREDENTIALS.md for use.
Closes#21548
Make CURLOPT_GSSAPI_DELEGATION effective on Windows builds that use SSPI
(instead of a native GSS-API implementation), so Kerberos delegation can
be requested during SPNEGO/Negotiate authentication.
Closes#21528
Previously, the use of checkprefix() alone allowed the code to match not
only on "blksize" but also (mistakenly) on "blksizeFOO" etc.
Reported-by: Andrew Nesbit
Closes#21560
The events on a multi wakeup socketpair were only consumed via
curl_multi_poll()/curl_multi_wait() but not in event based processing on
a curl_multi_socket() call. That led to busy loops as reported in
Fixes#21547
Reported-by: Earnestly on github
Closes#21549
- disable DES with nettle 4. It no longer supports it.
```
lib/curl_ntlm_core.c:67:12: fatal error: 'nettle/des.h' file not found
67 | # include <nettle/des.h>
| ^~~~~~~~~~~~~~
```
- fix MD4 support with nettle 4.
```
lib/md4.c:178:36: error: too many arguments to function call, expected 2, have 3
178 | md4_digest(ctx, MD4_DIGEST_SIZE, digest);
| ~~~~~~~~~~ ^~~~~~
```
- fix unused argument compiler warning:
```
lib/vtls/gtls.c:2267:39: error: unused parameter 'sha256len' [clang-diagnostic-unused-parameter,-warnings-as-errors]
2267 | size_t sha256len)
| ^
```
Ref: https://github.com/curl/curl/actions/runs/25710321195/job/75488970143?pr=21557
- GHA/macos: stop enabling NTLM in the GnuTLS job.
It no longer builds due to missing DES support in nettle 4.
```
lib/curl_ntlm_core.c:90:4: error: "cannot compile NTLM support without a crypto library with DES."
90 | # error "cannot compile NTLM support without a crypto library with DES."
| ^
```
Ref: https://github.com/curl/curl/actions/runs/25710321195/job/75488970170?pr=21557
Follow-up to cfadbaa133#21169Closes#21557
By moving operations Perl-native (from shell and external commands), and
passing arguments individually to external commands.
Pointed out by Codex Security
Closes#21104
Exporting the component name as passed in is somewhat boring. OTOH it is
convenient for reuse.
- FindNGTCP2: export crypto backend in `NGTCP2_CRYPTO_BACKEND`.
- pass `COMPONENTS` `NGTCP2_CRYPTO_BACKEND` in `curl-config.cmake`.
- FindNGTCP2: fix to skip Config detection when optional `COMPONENTS` is
not passed.
Co-authored-by: Viktor Szakats
Reported-by: x-xiang on github
Fixes#21523
Follow-up to 8fce3e17e6#20814Closes#21540
These macros are leftovers from when DNS caching was moved out of
hostip.c into its own source file. Both are still defined and used in
lib/dnscache.c; the copies in lib/hostip.c are unreferenced.
Detected with clang -Wunused-macros.
Follow-up to 96d5b5c688Closes#21550
This bit was used to do Digest authentication like Internet Explorer
before version 7 (released on October 18, 2006). Presumably no one uses
this anymore and since it is hard to use and does broken auth, starting
in 8.21.0 this bit does nothing (except setting the actual Digest bit).
Closes#21486
When detecting these dependencies via CMake Config and their main
imported target is undefined, automatically assume and use their static
imported target instead.
Adopting from vcpkg downstream, where it's done for nghttp3 and ngtcp2,
but not for nghttp2.
Refs:
773e092a82/ports/curl/dependencies.patch70b941a5d2
Downstream-patch-by: Kai Pastor
Closes#21470
The code would previously read one byte past the provided
CURLOPT_CAINFO_BLOB if the blob ends exactly with -----BEGIN
CERTIFICATE-----
Reported-by: Andrew Nesbit
Closes#21543
It no longer requires "a special build" of OpenSSL, just OpenSSL 4+.
Emphasize the experimental part a little clearer.
Drop the caveat for wolfSSL from the main description.
Closes#21536
- passing an unknown string to CURLOPT_ECH now returns error
To properly allow applications to spot if they pass in a typo or
something to libcurl.
- CURLECH_DISABLE is now a plain zero internally, not a dedicated bit which
simplifies checks for when ECH is enabled
- Dropped the CURLECH_CLA_CFG bit, and just check STRING_ECH_CONFIG
- Turn grease/enable/hard into three different numerical values, no bitmask
needed
- Convert the struct field 'tls_ech' from an int to a byte.
Closes#21532
Due to how the range span globbing code works, a range that ends with
9223372036854775807 (the maximum signed 63 bit value) cannot be used as
it triggers an integer overflow.
Verified in test 2092
Reported-by: Andrew Nesbit
Closes#21529
The 'ber' pointer could remain allocated in the exit path if the write
callback returned error for one of the Curl_client_write() calls.
Reported-by: Andrew Nesbit
Closes#21530
When a connection is tested for reuse in a transfer that *may* upgrade
to TLS (commonly via STARTTLS), the SSL configuration must match the
existing connection.
Reported-by: Andrew Nesbit
Closes#21522
- rename `req->proxyuserpwd` to `req->hd_proxy_auth`
- rename `req->userpwd` to `req->hd_auth`
- rename parameter `proxytunnel` to `is_connect` for Curl_http_output_auth()
- move path+query concatenation into Curl_http_output_auth(), saving an alloc when no auth is in play
- rename `H1_HD_USER_AUTH` into `H1_HD_AUTH`
Closes#21513
