VulnerabilityPublished 29 Oct 2026

CVE-2026-11856: curl security, bug fix, and enhancement update

Affects curlSource GCVE Database

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Not known to be exploited : upgrade to 7.61.1-34.el8_10.18 soon.

Data as of 30 Oct 2026, 02:01 UTC

Severity

High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Patch: Available – fixed in 7.61.1-34.el8_10.18

Exploitation evidence

Disclosed: evidence found.
CVE published 29 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

almalinux-8

What to do

Upgrade the AlmaLinux to 7.61.1-34.el8_10.18.

Patches and advisories

access.redhat.com/errata/RHSA-2026:92368 (opens in a new tab)

Affected software

Product	Affected	Fixed in
AlmaLinux 8curl	Affected <7.61.1-34.el8_10.18	Fixed in 7.61.1-34.el8_10.18
AlmaLinux 8libcurl	Affected <7.61.1-34.el8_10.18	Fixed in 7.61.1-34.el8_10.18
AlmaLinux 8libcurl-devel	Affected <7.61.1-34.el8_10.18	Fixed in 7.61.1-34.el8_10.18
AlmaLinux 8libcurl-minimal	Affected <7.61.1-34.el8_10.18	Fixed in 7.61.1-34.el8_10.18

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A patch is available in Red Hat Enterprise Linux 8 at version 7.61.1-34.el8_10.18. Users should apply this update promptly to remediate the vulnerabilities. The vendor advisory confirms the availability of this fix and provides instructions for updating affected systems.

Description

Multiple security vulnerabilities have been identified in the curl packages, including libcurl and the curl utility. These include information disclosure via incorrect Digest authentication header reuse (CVE-2026-11856), unauthorized connection reuse, cookie injection, and security feature bypasses related to mTLS connection reuse. An update is available that addresses these issues in Red Hat Enterprise Linux 8. The vulnerabilities could lead to unauthorized data exposure and bypass of security features if exploited.

References

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