Your message dated Sun, 16 Aug 2026 20:21:16 +0000
with message-id <[email protected]>
and subject line Bug#1144341: fixed in golang-1.26 1.26.6-1
has caused the Debian Bug report #1144341,
regarding golang-1.26: CVE-2026-33818 CVE-2026-56853 CVE-2026-56858
CVE-2026-56859 CVE-2026-56860 CVE-2026-56862 CVE-2026-56864 CVE-2026-56865
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
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--
1144341: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1144341
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Source: golang-1.27
Version: 1.27~rc2-1
Severity: grave
Tags: security upstream
X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Control: clone -1 -2 -3
Control: reassign -2 src:golang-1.26 1.26.5-1
Control: retitle -2 golang-1.26: CVE-2026-33818 CVE-2026-56853 CVE-2026-56858
CVE-2026-56859 CVE-2026-56860 CVE-2026-56862 CVE-2026-56864 CVE-2026-56865
Control: reassign -3 src:golang-1.25 1.25.12-1
Control: retitle -3 golang-1.25: CVE-2026-33818 CVE-2026-56853 CVE-2026-56858
CVE-2026-56859 CVE-2026-56860 CVE-2026-56862 CVE-2026-56864 CVE-2026-56865
Hi,
The following vulnerabilities were published for go.
CVE-2026-33818[0]:
| Enforce a recursion limit in Unmarshal to prevent stack exhaustion
| when parsing deeply-nested, recursive structures.
CVE-2026-56853[1]:
| When a server is configured to support unencrypted HTTP/2, it reads
| a few bytes from each new connection to see if they contain the
| HTTP/2 client preface. ReadHeaderTimeout is unexpectedly not being
| applied when doing this.
CVE-2026-56858[2]:
| Previously, pathological inputs could close an unescaped '/' early,
| allowing for attack-controlled data to inject arbitrary content,
| potentially leading to XSS.
CVE-2026-56859[3]:
| Previously, DecodeElement would reset the depth counter causing it
| to never fire; this could lead to stack exhaustion.
CVE-2026-56860[4]:
| Previously, resolving relative paths containing parent directory
| ('..') segments performed string conversions and buffer rewrites on
| each step, resulting in quadratic time complexity and high memory
| allocation overhead. Now, path resolution operates on a byte buffer
| using index-based backtracking for '..' segments, eliminating the
| quadratic time complexity and significantly reducing memory
| allocations.
CVE-2026-56862[5]:
| Handshake messages, such as KeyUpdate, are always considered as
| state-advancing, regardless of whether a handshake has been
| completed or not. As a result, a malicious client can keep sending
| KeyUpdate messages to force the server to keep performing key
| derivation operations indefinitely.
CVE-2026-56864[6]:
| A malicious GOSUMDB was capable of serving arbitrary module content
| not contained within the transparency log. This attack allows for a
| coordinating GOPROXY and GOSUMDB to serve a client malicious module
| content that cannot be detected by evaluating the transparency log.
| In order to determine if you have been affected: rm -r go.sum
| go.work.sum vendor/ && go mod tidy
CVE-2026-56865[7]:
| A malicious GOPROXY was previously capable of forging up to two
| sumdb tiles that allow for a requested module to bypass the GOSUMDB
| check and persist attacker-controlled module content to a local Go
| module cache. This attack allows for a malicious GOPROXY to serve
| malicious module content that cannot be detected by evaluating the
| transparency log. All tiles are now correctly verified against their
| parents. In order to determine if you have been affected: rm -r
| go.sum go.work.sum vendor/ && go mod tidy
If you fix the vulnerabilities please also make sure to include the
CVE (Common Vulnerabilities & Exposures) ids in your changelog entry.
For further information see:
[0] https://security-tracker.debian.org/tracker/CVE-2026-33818
https://www.cve.org/CVERecord?id=CVE-2026-33818
[1] https://security-tracker.debian.org/tracker/CVE-2026-56853
https://www.cve.org/CVERecord?id=CVE-2026-56853
[2] https://security-tracker.debian.org/tracker/CVE-2026-56858
https://www.cve.org/CVERecord?id=CVE-2026-56858
[3] https://security-tracker.debian.org/tracker/CVE-2026-56859
https://www.cve.org/CVERecord?id=CVE-2026-56859
[4] https://security-tracker.debian.org/tracker/CVE-2026-56860
https://www.cve.org/CVERecord?id=CVE-2026-56860
[5] https://security-tracker.debian.org/tracker/CVE-2026-56862
https://www.cve.org/CVERecord?id=CVE-2026-56862
[6] https://security-tracker.debian.org/tracker/CVE-2026-56864
https://www.cve.org/CVERecord?id=CVE-2026-56864
[7] https://security-tracker.debian.org/tracker/CVE-2026-56865
https://www.cve.org/CVERecord?id=CVE-2026-56865
Regards,
Salvatore
--- End Message ---
--- Begin Message ---
Source: golang-1.26
Source-Version: 1.26.6-1
Done: Dr. Tobias Quathamer <[email protected]>
We believe that the bug you reported is fixed in the latest version of
golang-1.26, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Dr. Tobias Quathamer <[email protected]> (supplier of updated golang-1.26
package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Sun, 16 Aug 2026 21:33:13 +0200
Source: golang-1.26
Architecture: source
Version: 1.26.6-1
Distribution: unstable
Urgency: medium
Maintainer: Debian Go Compiler Team <[email protected]>
Changed-By: Dr. Tobias Quathamer <[email protected]>
Closes: 1144341
Changes:
golang-1.26 (1.26.6-1) unstable; urgency=medium
.
* New upstream version 1.26.6 (Closes: #1144341)
- CVE-2026-56865
A malicious GOPROXY was previously capable of forging up to two sumdb
tiles that allow for a requested module to bypass the GOSUMDB check and
persist attacker-controlled module content to a local Go module cache.
This attack allows for a malicious GOPROXY to serve malicious module
content that cannot be detected by evaluating the transparency log. All
tiles are now correctly verified against their parents. In order to
determine if you have been affected: rm -r go.sum go.work.sum vendor/ &&
go mod tidy
- CVE-2026-56864
A malicious GOSUMDB was capable of serving arbitrary module content not
contained within the transparency log. This attack allows for a
coordinating GOPROXY and GOSUMDB to serve a client malicious module
content that cannot be detected by evaluating the transparency log. In
order to determine if you have been affected: rm -r go.sum go.work.sum
vendor/ && go mod tidy
- CVE-2026-56862
Handshake messages, such as KeyUpdate, are always considered as
state-advancing, regardless of whether a handshake has been completed or
not. As a result, a malicious client can keep sending KeyUpdate messages
to force the server to keep performing key derivation operations
indefinitely.
- CVE-2026-56860
Previously, resolving relative paths containing parent directory ('..')
segments performed string conversions and buffer rewrites on each step,
resulting in quadratic time complexity and high memory allocation
overhead. Now, path resolution operates on a byte buffer using
index-based backtracking for '..' segments, eliminating the quadratic
time complexity and significantly reducing memory allocations.
- CVE-2026-56859
Previously, DecodeElement would reset the depth counter causing it to
never fire; this could lead to stack exhaustion.
- CVE-2026-56858
Previously, pathological inputs could close an unescaped '/' early,
allowing for attack-controlled data to inject arbitrary content,
potentially leading to XSS.
- CVE-2026-56853
When a server is configured to support unencrypted HTTP/2, it reads a
few bytes from each new connection to see if they contain the HTTP/2
client preface. ReadHeaderTimeout is unexpectedly not being applied when
doing this.
- CVE-2026-33818
Enforce a recursion limit in Unmarshal to prevent stack exhaustion when
parsing deeply-nested, recursive structures.
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