VulnSocial

CVE-2026-45271General

LOWCVSS 5.5 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Picotls is a TLS protocol library that allows users select different crypto backends based on their use case. Picotls implements its own ASN.1 validation helper, which is used by the minicrypto backend while parsing local PKCS#8 private keys. Prior to commit c14231d801407640bc42c2dcf92783409ea6a7c7, the validator recursively descends into constructed ASN.1 elements without enforcing a maximum nesting depth. If an application loads an attacker-supplied private-key file through ptls_minicrypto_load_private_key(), or otherwise calls the public ASN.1 validation API on untrusted DER, a crafted deeply nested ASN.1 structure can exhaust the process stack and crash the application. Note that the libcrypto (OpenSSL) backend does not use the ASN.1 validation helper of picotls, and therefore is immune to this vulnerability. The vulnerability has been addressed in commit c14231d801407640bc42c2dcf92783409ea6a7c7.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-835

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • General: 2 classified signals
  • 2 total mentions across 1 day

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-08-21: 208-21
Signal classification1 categories
General
2100.0%
Referenced assets2 URLs
By indicator
Full discourse2 posts
  • Infoflowcloud@infoflowcloud
    General

    🚨*CVE* CVE-2026-45271 Picotls is a TLS protocol library that allows users select different crypto backends based on their use case. Picotls implements its own ASN.1 validation helper, whic… https://www.cve.org/CVERecord?id=CVE-2026-45271 ----- Traducción: CVE-2026-45271 Pic… http://infoflow.cloud`

    Post summary

    The tweet shares a link to CVE-2026-45271 and a short description of Picotls, but does not provide a PoC, exploit, active usage, patch, or detailed vulnerability information.

    0000027
    102 followersView on X
  • CVE@CVEnew
    General

    CVE-2026-45271 Picotls is a TLS protocol library that allows users select different crypto backends based on their use case. Picotls implements its own ASN.1 validation helper, whic… https://www.cve.org/CVERecord?id=CVE-2026-45271

    Post summary

    The snippet merely notes CVE‑2026‑45271 in the context of Picotls, providing no technical, PoC, patch, or exploitation details.

    000001.1K
    58.0K followersView on X

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