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Fencer Intel
medium 6.1

CVE-2026-118766 json

Botan: Online OCSP redirects enable blind requests to internal HTTP services

published 11d ago modified 6d ago also EUVD-2026-113275

cvss
6.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 0%
public exploits
0
none known

Summary

Botan is a C++ cryptography library. Prior to 3.13.0, Botan's online OCSP client allowed a single HTTP redirect while posting an OCSP request to the URI in a certificate's Authority Information Access extension. A malicious OCSP responder or an on-path attacker could redirect the client to make one blind request to an otherwise unreachable internal HTTP service. The primary impact is blind SSRF that might affect internal services with non-idempotent GET handlers, and response timing can provide a coarse internal-service oracle. This issue is fixed in version 3.13.0.

Patch / fix

  • botan_project botan 3.13.0
  • botan3 Debian 14 3.13.0+dfsg-2

debian advisories DEBIAN-CVE-2026-118766

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-118766 updated cvss 6.5

botan: Botan: Server-Side Request Forgery via OCSP client HTTP redirect

  • Red Hat Ansible Automation Platform 2 ansible-automation-platform-27/hub-rhel9 Red Hat Enterprise Linux 9 rust-sequoia-sq Red Hat Enterprise Linux 10 rust-sequoia-sq, rust-sequoia-sqv, rust-podman-sequoia
    affected: no fix available “Fix deferred”
  • Red Hat Hardened Images rust-rpm-sequoia, rust-podman-sequoia
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
6d ago

Exploit prediction

0.10% chance of exploitation in the next 30 days, higher than 0% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 6.1 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L

Affected products

  • randombit botan

Classification

Weakness
  • CWE-918 Server-Side Request Forgery

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.