Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
python-cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In versions 42.0.0 through 48.0.0, when resolving invalid certificate chains that include duplicate copies of self-signed certificates, the processing recursively invokes the same candidate, leading to an exponential blowup. Although the limitation that the chain depth cannot exceed a specified maximum depth prevents unbounded recursion and guarantees termination, an attacker-controlled certificate chain can lead the processing to easily take more than 5s to reject in testing. This amplification could form the basis for a resource exhaustion denial of service attack. The core issue arises in the recursive nature of build_chain_inner, which does not de-duplicate against previously analyzed candidates. As the correctness of validation is not affected, the integrity of a system cannot be compromised through this vector, only its availability. This issue is fixed in 49.0.0.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
STABLE
| Date | Total | Labels |
|---|
| 2026-08-03 | 2 | General2 |
| 2026-10-30 | 1 | Disclosure1 |
🔴 #Python Cryptography, Denial of Service, #CVE-2026-69249 (Critical) -DC-Oct2026-3985 https://dailycve.com/python-cryptography-denial-of-service-cve-2026-69249-critical-dc-oct2026-3985/
Post summary
The tweet discloses a critical denial‑of‑service vulnerability (CVE‑2026‑69249) affecting the Python Cryptography library, noting its severity without mentioning proof‑of‑concept, exploits, patches, or active exploitation.
🚨*CVE* CVE-2026-69249 python-cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to 49.0.0, when resolving invalid certificate cha… https://www.cve.org/CVERecord?id=CVE-2026-69249 ----- Traducción: CVE-2026-69249 pyt… http://infoflow.cloud`
Post summary
The tweet references CVE‑2026‑69249, noting a certificate validation issue in python‑cryptography prior to version 49.0.0, but provides no PoC, exploit, or patch details.
CVE-2026-69249 python-cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to 49.0.0, when resolving invalid certificate cha… https://www.cve.org/CVERecord?id=CVE-2026-69249
Post summary
The tweet simply references CVE‑2026‑69249 and links to its CVE record; it provides no further details about the vulnerability, its exploitation, or mitigation.