Critical
golang-github-cloudflare-circl — security advisory
The CombinedMult function in the CIRCL ecc/p384 package (secp384r1 curve) produces an incorrect value for specific inputs. The issue is fixed by using complete addition formulas. ECDH and ECDSA signing relying on this curve are not affected. The bug was fixed in v1.6.3 https://github.com/cloudflare/circl/releases/tag/v1.6.3 .
- Products
- golang-github-cloudflare-circl
- Affected versions
- 1.0.0+20200724-1, 1.0.0+20200724-1ubuntu1, 1.3.3-1, 1.3.5-1, 1.3.6-1, 1.3.7-1, 1.6.0-1, 1.6.1-1, 1.6.3-1, 1.6.4-2, 1.6.5-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-1229
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:02 UTC · Revision 1
Source evidence
The CombinedMult function in the CIRCL ecc/p384 package (secp384r1 curve) produces an incorrect value for specific inputs. The issue is fixed by using complete addition formulas. ECDH and ECDSA signing relying on this curve are not affected. The bug was fixed in v1.6.3 https://github.com/cloudflare/circl/releases/tag/v1.6.3 .
osv:UBUNTU-CVE-2026-1229
golang-github-cloudflare-circl
Fixed versions: Not specified
golang-github-cloudflare-circl
Fixed versions: Not specified
golang-github-cloudflare-circl
Fixed versions: Not specified
golang-github-cloudflare-circl
Fixed versions: Not specified
golang-github-cloudflare-circl
Fixed versions: Not specified
Complete source record
{
"id": "8a9aa243d752de811bd1f352abac60c4f59170724f0d67e766a00a71790a6aa4",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-1229",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-1229",
"summary": "The CombinedMult function in the CIRCL ecc/p384 package (secp384r1 curve) produces an incorrect value for specific inputs. The issue is fixed by using complete addition formulas. ECDH and ECDSA signing relying on this curve are not affected. The bug was fixed in v1.6.3 https://github.com/cloudflare/circl/releases/tag/v1.6.3 .",
"evidence": "osv:UBUNTU-CVE-2026-1229",
"products": [
{
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"value": "golang-github-cloudflare-circl",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.0.0+20200724-1",
"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
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{
"name": {
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"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/2/versions"
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{
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{
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"evidence": "/affected/3/package/name"
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"affected_versions": [
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"evidence": "/affected/3/versions"
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{
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{
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{
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"evidence": "/affected/4/package/name"
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},
{
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"evidence": "/affected/4/versions"
}
]
}
],
"severity": "critical",
"structured": {
"id": "UBUNTU-CVE-2026-1229",
"aliases": [
"UBUNTU-CVE-2026-1229"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/U:Amber"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "golang-github-cloudflare-circl",
"purl": "pkg:deb/ubuntu/golang-github-cloudflare-circl?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"1.0.0+20200724-1",
"1.0.0+20200724-1ubuntu1"
],
"database_specific": {
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},
"ecosystem_specific": {
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"package": {
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"ecosystem": "Ubuntu:24.04:LTS"
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"versions": [
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"ecosystem_specific": {
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{
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"package": {
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"purl": "pkg:deb/ubuntu/golang-github-cloudflare-circl?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"1.6.0-1",
"1.6.1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1229.json"
},
"ecosystem_specific": {
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{
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{
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"package": {
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"purl": "pkg:deb/ubuntu/golang-github-cloudflare-circl?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
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"1.6.4-2",
"1.6.5-1"
],
"database_specific": {
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},
"ecosystem_specific": {
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},
{
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"package": {
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"purl": "pkg:deb/ubuntu/golang-github-cloudflare-circl?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1.6.1-1",
"1.6.3-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1229.json"
},
"ecosystem_specific": {
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{
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}
]
}
}
],
"modified": "2026-10-17T12:58:05.470303984Z",
"provider": "osv",
"upstream": [
"CVE-2026-1229"
],
"references": [
"https://ubuntu.com/security/CVE-2026-1229",
"https://www.cve.org/CVERecord?id=CVE-2026-1229",
"https://github.com/cloudflare/circl"
]
},
"related_cves": [
{
"value": "CVE-2026-1229",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 358021,
"published_at": "2026-02-24T08:16:00+00:00"
}