golang: Fix of 6 CVEs
- CVE-2026-27142: fix missing escaping of URLs in meta tag content attributes in html/template by tracking the url= portion of the content attribute and applying URL escaping (prerequisite for CVE-2026-39823) - CVE-2026-39826: fix escaper bypass in html/template by treating script type attributes that are empty or whitespace-only as JavaScript - CVE-2026-39825: fix query parameter smuggling in net/http/httputil ReverseProxy by reencoding outbound queries that exceed the urlmaxqueryparams limit so Rewrite hooks cannot be bypassed - CVE-2026-39819: fix 'go bug' writing files with predictable names in the system temporary directory by creating a private directory with os.MkdirTemp, preventing symlink-based file overwrite - CVE-2026-39817: fix 'go tool pack' extracting archive entries to arbitrary filesystem locations by refusing to extract files with directory components - CVE-2026-39823: fix XSS in html/template where ASCII whitespace around the '=' rune in a meta tag content attribute URL bypassed URL escaping
- Products
- go-toolset, golang, golang-bin, golang-docs, golang-misc, golang-race, golang-src, golang-tests
- Affected versions
- Not specified
- Fixed versions
- 1.25.7-1.el9_6.tuxcare.els10
- CVEs
- CVE-2026-27142, CVE-2026-39817, CVE-2026-39819, CVE-2026-39823, CVE-2026-39825, CVE-2026-39826
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:46 UTC · Revision 1
Source evidence
- CVE-2026-27142: fix missing escaping of URLs in meta tag content attributes in html/template by tracking the url= portion of the content attribute and applying URL escaping (prerequisite for CVE-2026-39823) - CVE-2026-39826: fix escaper bypass in html/template by treating script type attributes that are empty or whitespace-only as JavaScript - CVE-2026-39825: fix query parameter smuggling in net/http/httputil ReverseProxy by reencoding outbound queries that exceed the urlmaxqueryparams limit so Rewrite hooks cannot be bypassed - CVE-2026-39819: fix 'go bug' writing files with predictable names in the system temporary directory by creating a private directory with os.MkdirTemp, preventing symlink-based file overwrite - CVE-2026-39817: fix 'go tool pack' extracting archive entries to arbitrary filesystem locations by refusing to extract files with directory components - CVE-2026-39823: fix XSS in html/template where ASCII whitespace around the '=' rune in a meta tag content attribute URL bypassed URL escaping
osv:CLSA-2026-1781256571
go-toolset
Fixed versions: 1.25.7-1.el9_6.tuxcare.els10
golang
Fixed versions: 1.25.7-1.el9_6.tuxcare.els10
golang-bin
Fixed versions: 1.25.7-1.el9_6.tuxcare.els10
golang-docs
Fixed versions: 1.25.7-1.el9_6.tuxcare.els10
golang-misc
Fixed versions: 1.25.7-1.el9_6.tuxcare.els10
golang-race
Fixed versions: 1.25.7-1.el9_6.tuxcare.els10
golang-src
Fixed versions: 1.25.7-1.el9_6.tuxcare.els10
golang-tests
Fixed versions: 1.25.7-1.el9_6.tuxcare.els10
Complete source record
{
"id": "b682aa794c22826e5f2e8deb2ef19f40910db084bb54b86904f5b3e3c29fc592",
"url": "https://osv.dev/vulnerability/CLSA-2026-1781256571",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "golang: Fix of 6 CVEs",
"summary": "- CVE-2026-27142: fix missing escaping of URLs in meta tag content attributes in html/template by tracking the url= portion of the content attribute and applying URL escaping (prerequisite for CVE-2026-39823) - CVE-2026-39826: fix escaper bypass in html/template by treating script type attributes that are empty or whitespace-only as JavaScript - CVE-2026-39825: fix query parameter smuggling in net/http/httputil ReverseProxy by reencoding outbound queries that exceed the urlmaxqueryparams limit so Rewrite hooks cannot be bypassed - CVE-2026-39819: fix 'go bug' writing files with predictable names in the system temporary directory by creating a private directory with os.MkdirTemp, preventing symlink-based file overwrite - CVE-2026-39817: fix 'go tool pack' extracting archive entries to arbitrary filesystem locations by refusing to extract files with directory components - CVE-2026-39823: fix XSS in html/template where ASCII whitespace around the '=' rune in a meta tag content attribute URL bypassed URL escaping",
"evidence": "osv:CLSA-2026-1781256571",
"products": [
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{
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{
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"affected_versions": []
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{
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{
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"affected_versions": []
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{
"name": {
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"evidence": "/affected/5/ranges"
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"affected_versions": []
},
{
"name": {
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"evidence": "/affected/6/package/name"
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"affected_versions": []
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{
"name": {
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"evidence": "/affected/7/ranges"
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],
"affected_versions": []
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],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1781256571",
"aliases": [
"CLSA-2026-1781256571"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
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],
"package": {
"name": "go-toolset",
"purl": "pkg:rpm/tuxcare/go-toolset?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1781256571.json"
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{
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"package": {
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"purl": "pkg:rpm/tuxcare/golang?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
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{
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"package": {
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"purl": "pkg:rpm/tuxcare/golang-bin?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
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},
{
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"package": {
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"purl": "pkg:rpm/tuxcare/golang-docs?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
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"database_specific": {
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{
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"package": {
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"ecosystem": "TuxCare:AlmaLinux:9.6"
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"database_specific": {
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"package": {
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"ecosystem": "TuxCare:AlmaLinux:9.6"
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"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
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{
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"package": {
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"purl": "pkg:rpm/tuxcare/golang-tests?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
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],
"modified": "2026-10-26T09:43:16.076981870Z",
"provider": "osv",
"upstream": [
"CVE-2026-27142",
"CVE-2026-39817",
"CVE-2026-39819",
"CVE-2026-39823",
"CVE-2026-39825",
"CVE-2026-39826"
],
"references": [
"https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1781256571.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-27142",
"https://nvd.nist.gov/vuln/detail/CVE-2026-39817",
"https://nvd.nist.gov/vuln/detail/CVE-2026-39819",
"https://nvd.nist.gov/vuln/detail/CVE-2026-39823",
"https://nvd.nist.gov/vuln/detail/CVE-2026-39825",
"https://nvd.nist.gov/vuln/detail/CVE-2026-39826"
]
},
"related_cves": [
{
"value": "CVE-2026-27142",
"evidence": "/upstream"
},
{
"value": "CVE-2026-39817",
"evidence": "/upstream"
},
{
"value": "CVE-2026-39819",
"evidence": "/upstream"
},
{
"value": "CVE-2026-39823",
"evidence": "/upstream"
},
{
"value": "CVE-2026-39825",
"evidence": "/upstream"
},
{
"value": "CVE-2026-39826",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 449795,
"published_at": "2026-07-31T12:09:14+00:00"
}