CVE-2026-9079: curl Insufficiently Protected Credentials
CVSS: 9.8v3.1CriticalModified
AliasesALPINE-CVE-2026-9079UBUNTU-CVE-2026-9079DEBIAN-CVE-2026-9079CGA-27cv-fwvq-qqr4CGA-42qg-ffrf-rrpxCGA-453g-2826-9g38CGA-4r9h-j3qh-39jwCGA-5m89-48h7-2774CGA-6wxj-677q-jgp4CGA-736w-6c4c-38f4CGA-7pf8-hv3j-7g6pCGA-93wr-3mp5-p3p8CGA-9xjp-hc4r-mvvwCGA-c37g-m66h-4979CGA-cjcv-22fc-wpj7CGA-ff95-pv57-hp76CGA-fp8v-j2m4-p6xpCGA-h3w2-c9pp-f44xCGA-pp94-795v-fgm6CGA-qh3x-498f-86jvCGA-qpgh-9wxr-49vmCGA-rgm5-m4g7-hhwpCGA-vjj2-3434-r49f
Published 03-07-2026Last modified 15-09-2026
Vulnerability summary
CVE-2026-9079 is a critical (CVSS 9.8) Insufficiently Protected Credentials vulnerability in curl. EPSS estimates a 0.58% chance of exploitation in the next 30 days, higher than 46.9% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)EPSS score
0.58%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 13 · Related 11Timeline
- 03-07-2026PublishedVulnerability first disclosed.
- 15-09-2026Last modifiedVulnerability information updated.
Description
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 metrics
6 scores · 6 sources · 1 versionCritical 9.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 6 agree
- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · ChainguardEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.58%
Chance of exploitation in the next 30 days
Percentile
47%
Versus all other CVEs
30-day change
0.00 pp
From 0.58% on 20-09-2026
20-09-202620-10-2026
EPSS score0.58%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (hackerone.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Chainguard10 products
- eco-python-curl< 8.21.0-r0
- eco-python-curl-minimal< 8.21.0-r0
- eco-python-curl-minimal-bin< 8.21.0-r0
- eco-python-curl-minimal-dev< 8.21.0-r0
- eco-python-curl-minimal-doc< 8.21.0-r0
Alpine1 product
- curl≥ 8.8.0, < 8.22.0-r0 | ≥ 8.8.0, < 8.21.0-r0
Curl1 product
- curl≥ 8.8.0, < 8.14.2 | ≥ 8.15.0, < 8.16.1 | ≥ 8.17.0, < 8.20.1 | ≥ d5e83eb745762f48d8fafadc5df5dd3ae8d8941e, < 88c7e16cceec816a2df45c899d49b1e85513f193 | 8.20.0 | 8.19.0 | 8.18.0 | 8.17.0 | 8.16.0 | 8.15.0 | 8.14.1 | 8.14.0 | 8.13.0 | 8.12.1 | 8.12.0 | 8.11.1 | 8.11.0 | 8.10.1 | 8.10.0 | 8.9.1 | 8.9.0 | 8.8.0
Debian1 product
- curlAll versions (No fix recorded) | < 8.21.0~rc2-1
Haxx1 product
- curl≥ 8.8.0, < 8.21.0
Ubuntu1 product
- curl< 8.14.1-2ubuntu1.4 | < 8.18.0-1ubuntu2.2
6 vendors · 15 products
